-19.1% is the change from 623 to 504
Calculation steps:
[( 504 - 623 ) ÷ 623] x 100 = -19.1%
Formula
Percentage change = [(504 - 623) / 623] x 100
Subtract the new number by the original number
504 - 623 = -119
-119 ÷ 623 = -0.19101123595505617
-0.19101123595505617 x 100 = -19.1%