-74.71% is the change from 866 to 219
Calculation steps:
[( 219 - 866 ) ÷ 866] x 100 = -74.71%
Formula
Percentage change = [(219 - 866) / 866] x 100
Subtract the new number by the original number
219 - 866 = -647
-647 ÷ 866 = -0.7471131639722863
-0.7471131639722863 x 100 = -74.71%