-81.43% is the change from 851 to 158
Calculation steps:
[( 158 - 851 ) ÷ 851] x 100 = -81.43%
Formula
Percentage change = [(158 - 851) / 851] x 100
Subtract the new number by the original number
158 - 851 = -693
-693 ÷ 851 = -0.8143360752056404
-0.8143360752056404 x 100 = -81.43%