15.52% is the change from 831 to 960
Calculation steps:
[( 960 - 831 ) ÷ 831] x 100 = 15.52%
Formula
Percentage change = [(960 - 831) / 831] x 100
Subtract the new number by the original number
960 - 831 = 129
129 ÷ 831 = 0.1552346570397112
0.1552346570397112 x 100 = 15.52%