17.3% is the change from 815 to 956
Calculation steps:
[( 956 - 815 ) ÷ 815] x 100 = 17.3%
Formula
Percentage change = [(956 - 815) / 815] x 100
Subtract the new number by the original number
956 - 815 = 141
141 ÷ 815 = 0.17300613496932515
0.17300613496932515 x 100 = 17.3%