830.77% is the change from 13 to 121
Calculation steps:
[( 121 - 13 ) ÷ 13] x 100 = 830.77%
Formula
Percentage change = [(121 - 13) / 13] x 100
Subtract the new number by the original number
121 - 13 = 108
108 ÷ 13 = 8.307692307692308
8.307692307692308 x 100 = 830.77%