-5.91% is the change from 508 to 478
Calculation steps:
[( 478 - 508 ) ÷ 508] x 100 = -5.91%
Formula
Percentage change = [(478 - 508) / 508] x 100
Subtract the new number by the original number
478 - 508 = -30
-30 ÷ 508 = -0.05905511811023622
-0.05905511811023622 x 100 = -5.91%