If the original value is 120 and the percent change is 25%, what is the amount of change?

If the original value is 120 and the percent change is 25%, what is the amount of change?

• A. 12
• B. 30
• C. 60
• D. 15

Answer: (B)

Percent of a number is found by multiplying the original value by the percent written as a decimal. Here, 25% is 0.25, so the change is 120 × 0.25 = 30. Another way to see it is that 25% is a quarter, and a quarter of 120 is 120 ÷ 4 = 30. So the amount of change is 30. (Since the percent is positive, this is an increase; the new value would be 150 if you needed it.)

Percent of a number is found by multiplying the original value by the percent written as a decimal. Here, 25% is 0.25, so the change is 120 × 0.25 = 30. Another way to see it is that 25% is a quarter, and a quarter of 120 is 120 ÷ 4 = 30. So the amount of change is 30. (Since the percent is positive, this is an increase; the new value would be 150 if you needed it.)