-83.25% is the change from 812 to 136
Calculation steps:
[( 136 - 812 ) ÷ 812] x 100 = -83.25%
Formula
Percentage change = [(136 - 812) / 812] x 100
Subtract the new number by the original number
136 - 812 = -676
-676 ÷ 812 = -0.8325123152709359
-0.8325123152709359 x 100 = -83.25%