473.33% is the change from 15 to 86
Calculation steps:
[( 86 - 15 ) ÷ 15] x 100 = 473.33%
Formula
Percentage change = [(86 - 15) / 15] x 100
Subtract the new number by the original number
86 - 15 = 71
71 ÷ 15 = 4.733333333333333
4.733333333333333 x 100 = 473.33%