-87.65% is the change from 850 to 105
Calculation steps:
[( 105 - 850 ) ÷ 850] x 100 = -87.65%
Formula
Percentage change = [(105 - 850) / 850] x 100
Subtract the new number by the original number
105 - 850 = -745
-745 ÷ 850 = -0.8764705882352941
-0.8764705882352941 x 100 = -87.65%