-85.4% is the change from 870 to 127
Calculation steps:
[( 127 - 870 ) ÷ 870] x 100 = -85.4%
Formula
Percentage change = [(127 - 870) / 870] x 100
Subtract the new number by the original number
127 - 870 = -743
-743 ÷ 870 = -0.8540229885057471
-0.8540229885057471 x 100 = -85.4%