-9.56% is the change from 502 to 454
Calculation steps:
[( 454 - 502 ) ÷ 502] x 100 = -9.56%
Formula
Percentage change = [(454 - 502) / 502] x 100
Subtract the new number by the original number
454 - 502 = -48
-48 ÷ 502 = -0.09561752988047809
-0.09561752988047809 x 100 = -9.56%