-74.27% is the change from 820 to 211
Calculation steps:
[( 211 - 820 ) ÷ 820] x 100 = -74.27%
Formula
Percentage change = [(211 - 820) / 820] x 100
Subtract the new number by the original number
211 - 820 = -609
-609 ÷ 820 = -0.7426829268292683
-0.7426829268292683 x 100 = -74.27%