Question

A shirt that is regulary priced at $22.50 is on sale for $18.00. What is the percentage of decrease in the price of the shirt?

Answer 1

the price after the sale is (18/22.5)*100 = 80% from the original price
so, the percentage of decrease in the price of the shirt is 100% - 80% = 20%


another way,
how much is decreased / original price *100
(22.5-18) / 22.5 *100 = 20%