72% of 90 = 80
A percent is 1 part out of 100.
1%isequalto
1
100
or0.01.
Proportions can be used to solve percent problems.
part
whole
=
percent
100
solve
The part is 72.
The percent is 90%.
Let n represent the whole.
Write a proportion to solve for n.
72
n
=
90
100
90n = 72 · 100
90n = 7,200
90n ÷ 90 = 7,200 ÷ 90
n = 80
It is: (72+108)/2 = 90
90% of 72 = 90% * 72 = 0.9 * 72 = 64.8
72.......107-98(9) 98-90(8) 90-83(7) 83-77(6) 77-[72](5) 72-68(4) 65
72 and 90
72 is an increase of negative 20% compared to 90.
90
It is: (72+108)/2 = 90
The number 63 is equal to 90 percent of the number 72.
The number 63 is equal to 90 percent of the number 72.
90
72
Because 18 is the largest number that divides evenly into both 72 and 90.
It is: (90-42)+24 = 72
The percent of decrease means "what is the percentage decrease from a larger number to a smaller number?" For example: What is the percentage decrease from 90 to 72? Solution: (90 - 72) / 90 = % 18 / 90 = 1 / 5 = .2 = 20% Check: 90 * .2 = 18 90 - 18 = 72 = true!
90% of 72 = 90% * 72 = 0.9 * 72 = 64.8
90-18 = 72
18 is.