-80.2% is the change from 813 to 161
Calculation steps:
[( 161 - 813 ) ÷ 813] x 100 = -80.2%
Formula
Percentage change = [(161 - 813) / 813] x 100
Subtract the new number by the original number
161 - 813 = -652
-652 ÷ 813 = -0.8019680196801968
-0.8019680196801968 x 100 = -80.2%