-76.1% is the change from 820 to 196
Calculation steps:
[( 196 - 820 ) ÷ 820] x 100 = -76.1%
Formula
Percentage change = [(196 - 820) / 820] x 100
Subtract the new number by the original number
196 - 820 = -624
-624 ÷ 820 = -0.7609756097560976
-0.7609756097560976 x 100 = -76.1%