-85.41% is the change from 850 to 124
Calculation steps:
[( 124 - 850 ) ÷ 850] x 100 = -85.41%
Formula
Percentage change = [(124 - 850) / 850] x 100
Subtract the new number by the original number
124 - 850 = -726
-726 ÷ 850 = -0.8541176470588235
-0.8541176470588235 x 100 = -85.41%