-9.15% is the change from 503 to 457
Calculation steps:
[( 457 - 503 ) ÷ 503] x 100 = -9.15%
Formula
Percentage change = [(457 - 503) / 503] x 100
Subtract the new number by the original number
457 - 503 = -46
-46 ÷ 503 = -0.09145129224652088
-0.09145129224652088 x 100 = -9.15%