-10.04% is the change from 906 to 815
Calculation steps:
[( 815 - 906 ) ÷ 906] x 100 = -10.04%
Formula
Percentage change = [(815 - 906) / 906] x 100
Subtract the new number by the original number
815 - 906 = -91
-91 ÷ 906 = -0.10044150110375276
-0.10044150110375276 x 100 = -10.04%