-9.54% is the change from 503 to 455
Calculation steps:
[( 455 - 503 ) ÷ 503] x 100 = -9.54%
Formula
Percentage change = [(455 - 503) / 503] x 100
Subtract the new number by the original number
455 - 503 = -48
-48 ÷ 503 = -0.09542743538767395
-0.09542743538767395 x 100 = -9.54%