-72.87% is the change from 870 to 236
Calculation steps:
[( 236 - 870 ) ÷ 870] x 100 = -72.87%
Formula
Percentage change = [(236 - 870) / 870] x 100
Subtract the new number by the original number
236 - 870 = -634
-634 ÷ 870 = -0.728735632183908
-0.728735632183908 x 100 = -72.87%