-87.24% is the change from 815 to 104
Calculation steps:
[( 104 - 815 ) ÷ 815] x 100 = -87.24%
Formula
Percentage change = [(104 - 815) / 815] x 100
Subtract the new number by the original number
104 - 815 = -711
-711 ÷ 815 = -0.8723926380368098
-0.8723926380368098 x 100 = -87.24%