-77.83% is the change from 821 to 182
Calculation steps:
[( 182 - 821 ) ÷ 821] x 100 = -77.83%
Formula
Percentage change = [(182 - 821) / 821] x 100
Subtract the new number by the original number
182 - 821 = -639
-639 ÷ 821 = -0.7783191230207065
-0.7783191230207065 x 100 = -77.83%