-79.42% is the change from 821 to 169
Calculation steps:
[( 169 - 821 ) ÷ 821] x 100 = -79.42%
Formula
Percentage change = [(169 - 821) / 821] x 100
Subtract the new number by the original number
169 - 821 = -652
-652 ÷ 821 = -0.7941534713763703
-0.7941534713763703 x 100 = -79.42%