FDPs Flashcards
Percent increase of 20%…
= new percent of 120%
OR multiply original value by 6/5
Percent increase of 10%…
= new percent of 110%
OR multiply original value by 1.1
Percent increase of 25%…
= new percent of 125%
OR multiply original value by 5/4
Percent increase of 50%…
= new percent of 150%
OR multiply original value by 3/2
Percent increase of 100%…
= new percent of 200%
OR multiply original value by 2
Percent decrease of 10%…
= new percent of 90%
OR multiply original value by .9
Percent decrease of 20%…
= new percent of 80%
OR multiply original value by .8 or 4/5
Percent decrease of 25%…
= new percent of 75%
OR multiply original value by .75 or 3/4
Percent decrease of 50%…
= new percent of 50%
OR multiply original value by 1/2
Percent decrease of 75%…
= new percent of 25%
OR multiply original value by 1/4
Convert .01 to percent and fraction
1% and 1/100
Convert .05 to percent and fraction
5% 1/20
Convert .1 to percent and fraction
10% and 1/10
Convert .125 to percent and fraction
12.5% and 1/8
Convert .2 to percent and fraction
20% and 1/5
Convert .25 to percent and fraction
25% and 1/4
Convert .3 to percent and fraction
30% and 3/10
Convert .3333 to percent and fraction
33.33% and 1/3
Convert .375 to percent and fraction
37.5% and 3/8
Convert .4 to percent and fraction
40% and 2/5
Convert .5 to percent and fraction
50% and 1/2
Convert .6 to percent and fraction
60% and 3/5
Convert .625 to percent and fraction
62.5% and 5/8
Convert .666 to percent and fraction
66.666% and 2/3
Convert .7 to percent and fraction
70% and 7/10
Convert .8 to a percent and fraction
80% and 4/5
Convert .875 to percent and fraction
87.5% and 7/8
Convert .9 to percent and fraction
90% and 9/10
Convert 1.2 to percent and fraction
120% and 6/5
Convert 1.25 to percent and fraction
125% and 5/4
Convert 1.5 to percent and fraction
150% and 3/2
2%
1/50
4%
1/25
5%
1/20
8.33%
1/12
12.5%
1/8
16.67%
1/6
37.5%
3/8
40%
2/5
60%
3/5
62.5%
5/8
66.67%
2/3
80%
4/5
83.33%
5/6
87.5%
7/8
120%
6/5
125%
5/4
133.33%
4/3
150%
3/2
175%
7/4
800, increased by 50% and then decreased by 30%, yields what number?
840
If 1500 is increased by 20% and then reduced by y%, yielding 1,080, what is y?
40%
Percent change equation
-if you want to find CHANGE in percent or change in actual value
Percent change = change in value/ original value
If the price of a $30 shirt is decreased by 20%, what is the final price of the shirt?
Want to find final price…
New percent = new value/ original value
80/100 = x/ 30
Simplify (4x10^-2)-(2.5x10^-3)
0.0375
Simplify 8th sq rt (0.00000256)
Write as decimal raised to fractional power, using powers of ten
(0.00000256)^(1/8) x (10^-8)^(1/8)
2x10^-1 = .2
0.0003 x 40,000 =
Multiplication - trade decimals
3 x 4 = 12