-23.28% is the change from 812 to 623
Calculation steps:
[( 623 - 812 ) ÷ 812] x 100 = -23.28%
Formula
Percentage change = [(623 - 812) / 812] x 100
Subtract the new number by the original number
623 - 812 = -189
-189 ÷ 812 = -0.23275862068965517
-0.23275862068965517 x 100 = -23.28%