-19.9% is the change from 623 to 499
Calculation steps:
[( 499 - 623 ) ÷ 623] x 100 = -19.9%
Formula
Percentage change = [(499 - 623) / 623] x 100
Subtract the new number by the original number
499 - 623 = -124
-124 ÷ 623 = -0.19903691813804172
-0.19903691813804172 x 100 = -19.9%