-81.46% is the change from 847 to 157
Calculation steps:
[( 157 - 847 ) ÷ 847] x 100 = -81.46%
Formula
Percentage change = [(157 - 847) / 847] x 100
Subtract the new number by the original number
157 - 847 = -690
-690 ÷ 847 = -0.8146399055489965
-0.8146399055489965 x 100 = -81.46%