-83.5% is the change from 818 to 135
Calculation steps:
[( 135 - 818 ) ÷ 818] x 100 = -83.5%
Formula
Percentage change = [(135 - 818) / 818] x 100
Subtract the new number by the original number
135 - 818 = -683
-683 ÷ 818 = -0.8349633251833741
-0.8349633251833741 x 100 = -83.5%