-23.37% is the change from 813 to 623
Calculation steps:
[( 623 - 813 ) ÷ 813] x 100 = -23.37%
Formula
Percentage change = [(623 - 813) / 813] x 100
Subtract the new number by the original number
623 - 813 = -190
-190 ÷ 813 = -0.23370233702337023
-0.23370233702337023 x 100 = -23.37%