-76.95% is the change from 820 to 189
Calculation steps:
[( 189 - 820 ) ÷ 820] x 100 = -76.95%
Formula
Percentage change = [(189 - 820) / 820] x 100
Subtract the new number by the original number
189 - 820 = -631
-631 ÷ 820 = -0.7695121951219512
-0.7695121951219512 x 100 = -76.95%