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To find 20 percent of a number, multiply the number by 0.2. In this instance, 0.2 x 90 = 18. Therefore, 20 percent of 90 is equal to 18.
90/450 x 100 = 20Therefore, 90 is 20 percent of 450.
20% of 90 = 0.20 X 90 = 18.0
10% off of 90 dollars = 90% of 90 dollars = 90 dollars * 90/100 = 81 dollars.
80% less than 90 = 20% of 90 = 18