-13.24% is the change from 506 to 439
Calculation steps:
[( 439 - 506 ) ÷ 506] x 100 = -13.24%
Formula
Percentage change = [(439 - 506) / 506] x 100
Subtract the new number by the original number
439 - 506 = -67
-67 ÷ 506 = -0.1324110671936759
-0.1324110671936759 x 100 = -13.24%