12.15% is the change from 815 to 914
Calculation steps:
[( 914 - 815 ) ÷ 815] x 100 = 12.15%
Formula
Percentage change = [(914 - 815) / 815] x 100
Subtract the new number by the original number
914 - 815 = 99
99 ÷ 815 = 0.12147239263803682
0.12147239263803682 x 100 = 12.15%