813.33% is the change from 15 to 137
Calculation steps:
[( 137 - 15 ) ÷ 15] x 100 = 813.33%
Formula
Percentage change = [(137 - 15) / 15] x 100
Subtract the new number by the original number
137 - 15 = 122
122 ÷ 15 = 8.133333333333333
8.133333333333333 x 100 = 813.33%