-88.25% is the change from 851 to 100
Calculation steps:
[( 100 - 851 ) ÷ 851] x 100 = -88.25%
Formula
Percentage change = [(100 - 851) / 851] x 100
Subtract the new number by the original number
100 - 851 = -751
-751 ÷ 851 = -0.882491186839013
-0.882491186839013 x 100 = -88.25%