-89.65% is the change from 850 to 88
Calculation steps:
[( 88 - 850 ) ÷ 850] x 100 = -89.65%
Formula
Percentage change = [(88 - 850) / 850] x 100
Subtract the new number by the original number
88 - 850 = -762
-762 ÷ 850 = -0.8964705882352941
-0.8964705882352941 x 100 = -89.65%