-76.83% is the change from 820 to 190
Calculation steps:
[( 190 - 820 ) ÷ 820] x 100 = -76.83%
Formula
Percentage change = [(190 - 820) / 820] x 100
Subtract the new number by the original number
190 - 820 = -630
-630 ÷ 820 = -0.7682926829268293
-0.7682926829268293 x 100 = -76.83%