-82.76% is the change from 870 to 150
Calculation steps:
[( 150 - 870 ) ÷ 870] x 100 = -82.76%
Formula
Percentage change = [(150 - 870) / 870] x 100
Subtract the new number by the original number
150 - 870 = -720
-720 ÷ 870 = -0.8275862068965517
-0.8275862068965517 x 100 = -82.76%