-74.04% is the change from 836 to 217
Calculation steps:
[( 217 - 836 ) ÷ 836] x 100 = -74.04%
Formula
Percentage change = [(217 - 836) / 836] x 100
Subtract the new number by the original number
217 - 836 = -619
-619 ÷ 836 = -0.7404306220095693
-0.7404306220095693 x 100 = -74.04%