-91.39% is the change from 813 to 70
Calculation steps:
[( 70 - 813 ) ÷ 813] x 100 = -91.39%
Formula
Percentage change = [(70 - 813) / 813] x 100
Subtract the new number by the original number
70 - 813 = -743
-743 ÷ 813 = -0.9138991389913899
-0.9138991389913899 x 100 = -91.39%