12 inches to 30 inches--find percent of change

Question

identify the percent the percent of change as an increase or decrease. Then find the percent of change. Round to the nearest tenth of a percent if necessary.

Answer 1

percent change = (new - old)/old

The old number is 12

the new number is 30

(30-12)/12 = 18/12 = 3/2 = 1.5 = 150%

Answer 2

30-12=18

18 is what percent of 12?

12x=18

/12 /12

x=1.5

150%