25% increase from 12 to 15.
20% decrease from 15 to 12.
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80 percent of 12 percent = 0.8 x 12 percent = 9.6 percent
Subtract the lower price from the higher one. Divide the difference by the original price. Multiply the answer by 100. Example: 15 dollars decreased to 12 dollars. 15 - 12 = 3 3/15 = 0.20 = 20 percent decrease Example: 12 dollars increased to 15 dollars. 15 - 12 = 3 3/12 = 0.25 = 25 percent increase
12 percent of 15 is 1.8
-3
15/1.25 = 12 Therefore, the number that 15 is 125 percent of, is 12.