-75.98% is the change from 820 to 197
Calculation steps:
[( 197 - 820 ) ÷ 820] x 100 = -75.98%
Formula
Percentage change = [(197 - 820) / 820] x 100
Subtract the new number by the original number
197 - 820 = -623
-623 ÷ 820 = -0.7597560975609756
-0.7597560975609756 x 100 = -75.98%