1512.5% is the change from 8 to 129
Calculation steps:
[( 129 - 8 ) ÷ 8] x 100 = 1512.5%
Formula
Percentage change = [(129 - 8) / 8] x 100
Subtract the new number by the original number
129 - 8 = 121
121 ÷ 8 = 15.125
15.125 x 100 = 1512.5%
Example