-83.8% is the change from 815 to 132
Calculation steps:
[( 132 - 815 ) ÷ 815] x 100 = -83.8%
Formula
Percentage change = [(132 - 815) / 815] x 100
Subtract the new number by the original number
132 - 815 = -683
-683 ÷ 815 = -0.838036809815951
-0.838036809815951 x 100 = -83.8%