-33.83% is the change from 813 to 538
Calculation steps:
[( 538 - 813 ) ÷ 813] x 100 = -33.83%
Formula
Percentage change = [(538 - 813) / 813] x 100
Subtract the new number by the original number
538 - 813 = -275
-275 ÷ 813 = -0.33825338253382536
-0.33825338253382536 x 100 = -33.83%