-81.02% is the change from 827 to 157
Calculation steps:
[( 157 - 827 ) ÷ 827] x 100 = -81.02%
Formula
Percentage change = [(157 - 827) / 827] x 100
Subtract the new number by the original number
157 - 827 = -670
-670 ÷ 827 = -0.8101571946795647
-0.8101571946795647 x 100 = -81.02%