-5.53% is the change from 506 to 478
Calculation steps:
[( 478 - 506 ) ÷ 506] x 100 = -5.53%
Formula
Percentage change = [(478 - 506) / 506] x 100
Subtract the new number by the original number
478 - 506 = -28
-28 ÷ 506 = -0.05533596837944664
-0.05533596837944664 x 100 = -5.53%