-20.39% is the change from 623 to 496
Calculation steps:
[( 496 - 623 ) ÷ 623] x 100 = -20.39%
Formula
Percentage change = [(496 - 623) / 623] x 100
Subtract the new number by the original number
496 - 623 = -127
-127 ÷ 623 = -0.20385232744783308
-0.20385232744783308 x 100 = -20.39%