-88.12% is the change from 850 to 101
Calculation steps:
[( 101 - 850 ) ÷ 850] x 100 = -88.12%
Formula
Percentage change = [(101 - 850) / 850] x 100
Subtract the new number by the original number
101 - 850 = -749
-749 ÷ 850 = -0.8811764705882353
-0.8811764705882353 x 100 = -88.12%