15.83% is the change from 815 to 944
Calculation steps:
[( 944 - 815 ) ÷ 815] x 100 = 15.83%
Formula
Percentage change = [(944 - 815) / 815] x 100
Subtract the new number by the original number
944 - 815 = 129
129 ÷ 815 = 0.15828220858895706
0.15828220858895706 x 100 = 15.83%