-17.39% is the change from 506 to 418
Calculation steps:
[( 418 - 506 ) ÷ 506] x 100 = -17.39%
Formula
Percentage change = [(418 - 506) / 506] x 100
Subtract the new number by the original number
418 - 506 = -88
-88 ÷ 506 = -0.17391304347826086
-0.17391304347826086 x 100 = -17.39%