-83.33% is the change from 870 to 145
Calculation steps:
[( 145 - 870 ) ÷ 870] x 100 = -83.33%
Formula
Percentage change = [(145 - 870) / 870] x 100
Subtract the new number by the original number
145 - 870 = -725
-725 ÷ 870 = -0.8333333333333334
-0.8333333333333334 x 100 = -83.33%