-9.74% is the change from 503 to 454
Calculation steps:
[( 454 - 503 ) ÷ 503] x 100 = -9.74%
Formula
Percentage change = [(454 - 503) / 503] x 100
Subtract the new number by the original number
454 - 503 = -49
-49 ÷ 503 = -0.09741550695825049
-0.09741550695825049 x 100 = -9.74%