-80.69% is the change from 813 to 157
Calculation steps:
[( 157 - 813 ) ÷ 813] x 100 = -80.69%
Formula
Percentage change = [(157 - 813) / 813] x 100
Subtract the new number by the original number
157 - 813 = -656
-656 ÷ 813 = -0.8068880688806888
-0.8068880688806888 x 100 = -80.69%