12.52% is the change from 815 to 917
Calculation steps:
[( 917 - 815 ) ÷ 815] x 100 = 12.52%
Formula
Percentage change = [(917 - 815) / 815] x 100
Subtract the new number by the original number
917 - 815 = 102
102 ÷ 815 = 0.12515337423312883
0.12515337423312883 x 100 = 12.52%