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54 Cards in this Set
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The term percent % means

% means one hundreths


% is the same as a ...

fraction
denominator is 100 numerator is that part EX 4% = 4 / 100 

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 : 

what does B S A mean

body surface area
different in children than adults b/c proportions are different. 

intravenous solutions are ordered in what?

percentage strengths
EX 1000 mL/cc 5% dextrose&water 

1,000 mL IV of 5% dextrose & water contains ? grams of dextrose?

1,000 mL = 1,000 grams
1,000 X .05 = 50 grams dextrose 

250 mL IV of 10% dextrose contains ? grams of dextrose?

250 X .1 = 25 grams dextrose


To change percentages to:
fractions decimals ratios drop the % sign and ... 
place the number over 100 and reduce to lowest terms


change 8% to a fraction

8% = 8/100 = 4/50 = 2/25


change 1/4% to a fraction
T R I C K Y 
1/4/100 = 1/4 X 1/100 = 1/400


1% = what fraction ?

1/100


2% = what fraction ?

2/100 = 1/50


50% = what fraction ?

50/100 = 5/10 = 1/2


80% = what fraction?

80/100 = 8/10 = 4/5


3% = what fraction?

3/100


to change a % to a decimal, drop the % sign, and move the deimal ... ?

move the decimal point two places to the left (add zeroes as needed)


25% = what in a decimal?

25 and move the decimal two over to the left = 0.25


1.4% = what in a decimal?

1.4 and move the decimal two over to 0.014


75% = what in a decimal?

.75
another way, 75/100 = 3/4 4√3.00 = 0.75 

10% change to a decimal

10 % = .1


35% = what as a decimal?

35% = 0.35


1/4% is what as a decimal?
TRICKY 
1/4% to a decimal =
4√1.000 = .25% .25% = 0.0025 

To change a % to a ratio ... ?

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 

what is 25% as a ratio?

25 / 100 = 1/4 = 1:4


what is 11% as a ratio?

11% as a ratio = 11/100
11:100 

75% is what as a ratio?

75/100 = 3/4 = 3:4


4.5% is what as a ratio?

4.5/100 = 4.5 : 100 = 9 : 200


2/5% is what as a ratio?

2/5 / 100 = 2/5 ∙ 1/100 =
2/500 = 1/250 = 1:250 

how do you change a fraction to a % ?

multiply the fraction by 100
reduce it add % sign EX 3/4 to % = 3/4 ∙ 100/1 = 300/4 = 75/1 = 75% 

change 5 1/2 to a percent

5 1/2 = 5∙2=10+1=11 so 11/2
11/2 ∙ 100/1 = 1,100/2 = 550/1 = 550% 

change 2/5 from a fraction to a %

2/5 ∙ 100/1 = 200/5 = 40%


change 11/4 from a fraction to a %

11/4 ∙ 100/1 = 1100/4 = 275%


1/2 change this fraction to a percentage

1/2 ∙ 100/1 = 100/2 = 50%


7/10 change to a %

7/10 ∙ 100/1 = 700/10 = 70%


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% 

change 2.35 to a %

2.35 to a %
235% 

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% 

change 1:25 to a %

1:25 = 1/25
1/25 ∙ 100/1 = 100/25 = 4% 

change 3:4 to a fraction

3:4 = 3/4
3/4 ∙ 100/1 = 300/4= 150/2=75% 

change 1:10 to a %

1:10 = 1/10
1/10 ∙ 100/1 = 100/10 = 10% 

change the ratio 1:100 to a %

1:100 = 1/100
1/100 ∙ 100/1 = 100/100 = 1% 

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. 

what is 40% of 90 ?

40% = .4
.4 X 90 = 36 and that's it! 

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 

what is 60% of 30

1) 60% = .6
2) .6 X 30 = 18.0 

what is 20% of 75?

20% = .2
.2 ∙ 75 = 15.0 

2 is what % of 200?
razzle dazzle here 
2/200 = 1/100
100√1.000 = .01 .01 move dec over 2 = 1% 

50 is what % of 500?

50/500= 5/50= 1/10
10√1.000 = .1 = 10% 

40 is what % of 1,000?

40/1000 = 4/100 = 2/50 = 1/25
25√1.000 = .04 = 4% 

whats the difference between a ratio and a proportion?

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 

what do means and extremes mean in a proportion?

means are the middle terms
extremes are the end terms 5:25::10:50 25 & 10 = means 5 & 50 = extremes 

means always equal what in a proportion?

means always equals the extremes in a correct proportion
Ex 5(extreme) 10(mean)  =  25(mean) 50(extreme) 

so the product of the means equals the product of the extremes AND if 3 of these numbers are known...

you can figure the 4th number, call it solve for X
Ex 12:9 = 8:X 12X = 72 X = 72/12 X = 6 

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 