-83.27% is the change from 813 to 136
Calculation steps:
[( 136 - 813 ) ÷ 813] x 100 = -83.27%
Formula
Percentage change = [(136 - 813) / 813] x 100
Subtract the new number by the original number
136 - 813 = -677
-677 ÷ 813 = -0.8327183271832719
-0.8327183271832719 x 100 = -83.27%