-50.6% is the change from 504 to 249
Calculation steps:
[( 249 - 504 ) ÷ 504] x 100 = -50.6%
Formula
Percentage change = [(249 - 504) / 504] x 100
Subtract the new number by the original number
249 - 504 = -255
-255 ÷ 504 = -0.5059523809523809
-0.5059523809523809 x 100 = -50.6%