-3.21% is the change from 623 to 603
Calculation steps:
[( 603 - 623 ) ÷ 623] x 100 = -3.21%
Formula
Percentage change = [(603 - 623) / 623] x 100
Subtract the new number by the original number
603 - 623 = -20
-20 ÷ 623 = -0.03210272873194221
-0.03210272873194221 x 100 = -3.21%