-27.77% is the change from 623 to 450
Calculation steps:
[( 450 - 623 ) ÷ 623] x 100 = -27.77%
Formula
Percentage change = [(450 - 623) / 623] x 100
Subtract the new number by the original number
450 - 623 = -173
-173 ÷ 623 = -0.27768860353130015
-0.27768860353130015 x 100 = -27.77%