-73.68% is the change from 836 to 220
Calculation steps:
[( 220 - 836 ) ÷ 836] x 100 = -73.68%
Formula
Percentage change = [(220 - 836) / 836] x 100
Subtract the new number by the original number
220 - 836 = -616
-616 ÷ 836 = -0.7368421052631579
-0.7368421052631579 x 100 = -73.68%