90
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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!
72 is 20% less than 90.
% rate = 90%=72/80 * 100%= 0.90 * 100%= 90%
(80*90) / 100 = 72