-9.72% is the change from 504 to 455
Calculation steps:
[( 455 - 504 ) ÷ 504] x 100 = -9.72%
Formula
Percentage change = [(455 - 504) / 504] x 100
Subtract the new number by the original number
455 - 504 = -49
-49 ÷ 504 = -0.09722222222222222
-0.09722222222222222 x 100 = -9.72%