373.33% is the change from 15 to 71
Calculation steps:
[( 71 - 15 ) ÷ 15] x 100 = 373.33%
Formula
Percentage change = [(71 - 15) / 15] x 100
Subtract the new number by the original number
71 - 15 = 56
56 ÷ 15 = 3.7333333333333334
3.7333333333333334 x 100 = 373.33%