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54 Cards in this Set
- Front
- Back
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The term percent % means
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% means one hundreths
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% is the same as a ...
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fraction
denominator is 100 numerator is that part EX 4% = 4 / 100 |
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what is the power of nines and what is it used for?
also, what does fdr stand for? |
burn areas of the body
powers of nine relates to the body in parts that = 100 % fdr stands for: fractions / decimals . ratios : |
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what does B S A mean
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body surface area
different in children than adults b/c proportions are different. |
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intravenous solutions are ordered in what?
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percentage strengths
EX 1000 mL/cc 5% dextrose&water |
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1,000 mL IV of 5% dextrose & water contains ? grams of dextrose?
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1,000 mL = 1,000 grams
1,000 X .05 = 50 grams dextrose |
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250 mL IV of 10% dextrose contains ? grams of dextrose?
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250 X .1 = 25 grams dextrose
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To change percentages to:
fractions decimals ratios drop the % sign and ... |
place the number over 100 and reduce to lowest terms
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change 8% to a fraction
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8% = 8/100 = 4/50 = 2/25
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change 1/4% to a fraction
T R I C K Y |
1/4/100 = 1/4 X 1/100 = 1/400
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1% = what fraction ?
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1/100
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2% = what fraction ?
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2/100 = 1/50
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50% = what fraction ?
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50/100 = 5/10 = 1/2
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80% = what fraction?
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80/100 = 8/10 = 4/5
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3% = what fraction?
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3/100
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to change a % to a decimal, drop the % sign, and move the deimal ... ?
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move the decimal point two places to the left (add zeroes as needed)
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25% = what in a decimal?
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25 and move the decimal two over to the left = 0.25
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1.4% = what in a decimal?
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1.4 and move the decimal two over to 0.014
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75% = what in a decimal?
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.75
another way, 75/100 = 3/4 4√3.00 = 0.75 |
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10% change to a decimal
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10 % = .1
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35% = what as a decimal?
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35% = 0.35
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1/4% is what as a decimal?
TRICKY |
1/4% to a decimal =
4√1.000 = .25% .25% = 0.0025 |
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To change a % to a ratio ... ?
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to change the % to a ratio
change it to a fraction, reduce to smalles terms, place numerator as 1st term & denominator as 2nd term use a colon to seperate the 2 EX 10% = (fraction) 10/100 10/100 = 1/10 = 1:10 |
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what is 25% as a ratio?
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25 / 100 = 1/4 = 1:4
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what is 11% as a ratio?
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11% as a ratio = 11/100
11:100 |
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75% is what as a ratio?
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75/100 = 3/4 = 3:4
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4.5% is what as a ratio?
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4.5/100 = 4.5 : 100 = 9 : 200
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2/5% is what as a ratio?
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2/5 / 100 = 2/5 ∙ 1/100 =
2/500 = 1/250 = 1:250 |
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how do you change a fraction to a % ?
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multiply the fraction by 100
reduce it add % sign EX 3/4 to % = 3/4 ∙ 100/1 = 300/4 = 75/1 = 75% |
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change 5 1/2 to a percent
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5 1/2 = 5∙2=10+1=11 so 11/2
11/2 ∙ 100/1 = 1,100/2 = 550/1 = 550% |
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change 2/5 from a fraction to a %
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2/5 ∙ 100/1 = 200/5 = 40%
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change 11/4 from a fraction to a %
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11/4 ∙ 100/1 = 1100/4 = 275%
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1/2 change this fraction to a percentage
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1/2 ∙ 100/1 = 100/2 = 50%
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7/10 change to a %
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7/10 ∙ 100/1 = 700/10 = 70%
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instead of changing fractions to a %, change a DECIMAL to a %
to change a decimal to a %, move the decimal point ... |
two places to the right (multiply), add zeroes if necessary, and add % sign
Ex ▲ 0.45 to % = 45% |
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change 2.35 to a %
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2.35 to a %
235% |
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To change a ratio to a %
1)change the ratio to a fraction 2) proceed w/ steps to change a fraction to % |
EX 1:4
1) ▲ 1:4 to a fraction=1/4 2) 1/4 ∙ 100/1 = 100/4=50/2=25% |
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change 1:25 to a %
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1:25 = 1/25
1/25 ∙ 100/1 = 100/25 = 4% |
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change 3:4 to a fraction
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3:4 = 3/4
3/4 ∙ 100/1 = 300/4= 150/2=75% |
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change 1:10 to a %
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1:10 = 1/10
1/10 ∙ 100/1 = 100/10 = 10% |
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change the ratio 1:100 to a %
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1:100 = 1/100
1/100 ∙ 100/1 = 100/100 = 1% |
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Determine the % of a quanity!
Nurses need to determine a given % or part of a quanity! when determining a given % of a number, do 2 things ... ? |
1) change the % to a decimal or fraction
( ▲ % to . or / ) 2) multiply the decimal or fraction by the number ( X . or / by the # ) Ex a patient says he drank 25% of his 8 oz. cup of tea. Determine what amount 25% is of 8 oz.s ! 1) 25% = .25 2) .25 X 8 = 2 oz.s Therefore, 25% of 8 oz.s=2 oz. |
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what is 40% of 90 ?
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40% = .4
.4 X 90 = 36 and that's it! |
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Determine the % one number is of another !
Ex. 12 is what % of 60? |
1) make it a fraction
12/60 2) 60√12.00 = 0.2 & 0.2 = 20% Therefore 12 is 20% of 60 OR 20% of 60 = 12 |
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what is 60% of 30
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1) 60% = .6
2) .6 X 30 = 18.0 |
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what is 20% of 75?
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20% = .2
.2 ∙ 75 = 15.0 |
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2 is what % of 200?
razzle dazzle here |
2/200 = 1/100
100√1.000 = .01 .01 move dec over 2 = 1% |
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50 is what % of 500?
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50/500= 5/50= 1/10
10√1.000 = .1 = 10% |
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40 is what % of 1,000?
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40/1000 = 4/100 = 2/50 = 1/25
25√1.000 = .04 = 4% |
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whats the difference between a ratio and a proportion?
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ratio is used to indicate a relationship b/t 2 numbers are seperated by a colon :
a proportion is an EQUATION of 2 ratios of equal value Ex 3:4 = 6:8 these can be seperated by an equal sign = or another colon sign :: 3:4 :: 6:8 These proportions can be written like fractions Ex 3/4 = 6/8 read it as 3 is to 4 equals 6 is to 8 or 3 is to 4 as 6 is to 8 or three fourths equals six eighths |
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what do means and extremes mean in a proportion?
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means are the middle terms
extremes are the end terms 5:25::10:50 25 & 10 = means 5 & 50 = extremes |
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means always equal what in a proportion?
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means always equals the extremes in a correct proportion
Ex 5(extreme) 10(mean) ---------- = ----------- 25(mean) 50(extreme) |
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so the product of the means equals the product of the extremes AND if 3 of these numbers are known...
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you can figure the 4th number, call it solve for X
Ex 12:9 = 8:X 12X = 72 X = 72/12 X = 6 |
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This concept goes into fractions, decimals, etc.
Ex 25:5 = 1.5:X remember this!!! X completes the exact equvialent! |
1/5 : 1 = 1/2 : x
solve: 1/2 x 1 = 1/5 x X 1/2 = 1/5X x = 1/2 ÷ 1/5 x = 5/2 = 2 1/2 or 2.5 to prove, plug x back into equation 1/2 = 1/2 |
