17.42% is the change from 815 to 957
Calculation steps:
[( 957 - 815 ) ÷ 815] x 100 = 17.42%
Formula
Percentage change = [(957 - 815) / 815] x 100
Subtract the new number by the original number
957 - 815 = 142
142 ÷ 815 = 0.17423312883435582
0.17423312883435582 x 100 = 17.42%