-84.71% is the change from 850 to 130
Calculation steps:
[( 130 - 850 ) ÷ 850] x 100 = -84.71%
Formula
Percentage change = [(130 - 850) / 850] x 100
Subtract the new number by the original number
130 - 850 = -720
-720 ÷ 850 = -0.8470588235294118
-0.8470588235294118 x 100 = -84.71%