-23.52% is the change from 812 to 621
Calculation steps:
[( 621 - 812 ) ÷ 812] x 100 = -23.52%
Formula
Percentage change = [(621 - 812) / 812] x 100
Subtract the new number by the original number
621 - 812 = -191
-191 ÷ 812 = -0.23522167487684728
-0.23522167487684728 x 100 = -23.52%