-76.55% is the change from 870 to 204
Calculation steps:
[( 204 - 870 ) ÷ 870] x 100 = -76.55%
Formula
Percentage change = [(204 - 870) / 870] x 100
Subtract the new number by the original number
204 - 870 = -666
-666 ÷ 870 = -0.7655172413793103
-0.7655172413793103 x 100 = -76.55%