-81.67% is the change from 851 to 156
Calculation steps:
[( 156 - 851 ) ÷ 851] x 100 = -81.67%
Formula
Percentage change = [(156 - 851) / 851] x 100
Subtract the new number by the original number
156 - 851 = -695
-695 ÷ 851 = -0.8166862514688602
-0.8166862514688602 x 100 = -81.67%