8.59% is the change from 815 to 885
Calculation steps:
[( 885 - 815 ) ÷ 815] x 100 = 8.59%
Formula
Percentage change = [(885 - 815) / 815] x 100
Subtract the new number by the original number
885 - 815 = 70
70 ÷ 815 = 0.08588957055214724
0.08588957055214724 x 100 = 8.59%