-7.91% is the change from 885 to 815
Calculation steps:
[( 815 - 885 ) ÷ 885] x 100 = -7.91%
Formula
Percentage change = [(815 - 885) / 885] x 100
Subtract the new number by the original number
815 - 885 = -70
-70 ÷ 885 = -0.07909604519774012
-0.07909604519774012 x 100 = -7.91%