-80.67% is the change from 812 to 157
Calculation steps:
[( 157 - 812 ) ÷ 812] x 100 = -80.67%
Formula
Percentage change = [(157 - 812) / 812] x 100
Subtract the new number by the original number
157 - 812 = -655
-655 ÷ 812 = -0.8066502463054187
-0.8066502463054187 x 100 = -80.67%