-71.59% is the change from 813 to 231
Calculation steps:
[( 231 - 813 ) ÷ 813] x 100 = -71.59%
Formula
Percentage change = [(231 - 813) / 813] x 100
Subtract the new number by the original number
231 - 813 = -582
-582 ÷ 813 = -0.7158671586715867
-0.7158671586715867 x 100 = -71.59%