-9.38% is the change from 501 to 454
Calculation steps:
[( 454 - 501 ) ÷ 501] x 100 = -9.38%
Formula
Percentage change = [(454 - 501) / 501] x 100
Subtract the new number by the original number
454 - 501 = -47
-47 ÷ 501 = -0.09381237524950099
-0.09381237524950099 x 100 = -9.38%