-10.63% is the change from 508 to 454
Calculation steps:
[( 454 - 508 ) ÷ 508] x 100 = -10.63%
Formula
Percentage change = [(454 - 508) / 508] x 100
Subtract the new number by the original number
454 - 508 = -54
-54 ÷ 508 = -0.1062992125984252
-0.1062992125984252 x 100 = -10.63%