-87.19% is the change from 851 to 109
Calculation steps:
[( 109 - 851 ) ÷ 851] x 100 = -87.19%
Formula
Percentage change = [(109 - 851) / 851] x 100
Subtract the new number by the original number
109 - 851 = -742
-742 ÷ 851 = -0.8719153936545241
-0.8719153936545241 x 100 = -87.19%