-80.93% is the change from 813 to 155
Calculation steps:
[( 155 - 813 ) ÷ 813] x 100 = -80.93%
Formula
Percentage change = [(155 - 813) / 813] x 100
Subtract the new number by the original number
155 - 813 = -658
-658 ÷ 813 = -0.8093480934809348
-0.8093480934809348 x 100 = -80.93%