Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/54

Click to flip

54 Cards in this Set

  • Front
  • Back
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