-84.61% is the change from 851 to 131
Calculation steps:
[( 131 - 851 ) ÷ 851] x 100 = -84.61%
Formula
Percentage change = [(131 - 851) / 851] x 100
Subtract the new number by the original number
131 - 851 = -720
-720 ÷ 851 = -0.8460634547591069
-0.8460634547591069 x 100 = -84.61%