-83.37% is the change from 812 to 135
Calculation steps:
[( 135 - 812 ) ÷ 812] x 100 = -83.37%
Formula
Percentage change = [(135 - 812) / 812] x 100
Subtract the new number by the original number
135 - 812 = -677
-677 ÷ 812 = -0.833743842364532
-0.833743842364532 x 100 = -83.37%