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% of 72 = 90% * 72 = 0.9 * 72 = 64.8
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!
90-18 = 72
18 is.