-80.54% is the change from 812 to 158
Calculation steps:
[( 158 - 812 ) ÷ 812] x 100 = -80.54%
Formula
Percentage change = [(158 - 812) / 812] x 100
Subtract the new number by the original number
158 - 812 = -654
-654 ÷ 812 = -0.8054187192118226
-0.8054187192118226 x 100 = -80.54%