-84.25% is the change from 870 to 137
Calculation steps:
[( 137 - 870 ) ÷ 870] x 100 = -84.25%
Formula
Percentage change = [(137 - 870) / 870] x 100
Subtract the new number by the original number
137 - 870 = -733
-733 ÷ 870 = -0.8425287356321839
-0.8425287356321839 x 100 = -84.25%