-23.62% is the change from 813 to 621
Calculation steps:
[( 621 - 813 ) ÷ 813] x 100 = -23.62%
Formula
Percentage change = [(621 - 813) / 813] x 100
Subtract the new number by the original number
621 - 813 = -192
-192 ÷ 813 = -0.23616236162361623
-0.23616236162361623 x 100 = -23.62%