12.88% is the change from 815 to 920
Calculation steps:
[( 920 - 815 ) ÷ 815] x 100 = 12.88%
Formula
Percentage change = [(920 - 815) / 815] x 100
Subtract the new number by the original number
920 - 815 = 105
105 ÷ 815 = 0.12883435582822086
0.12883435582822086 x 100 = 12.88%