-13.44% is the change from 506 to 438
Calculation steps:
[( 438 - 506 ) ÷ 506] x 100 = -13.44%
Formula
Percentage change = [(438 - 506) / 506] x 100
Subtract the new number by the original number
438 - 506 = -68
-68 ÷ 506 = -0.13438735177865613
-0.13438735177865613 x 100 = -13.44%