-16.99% is the change from 518 to 430
Calculation steps:
[( 430 - 518 ) ÷ 518] x 100 = -16.99%
Formula
Percentage change = [(430 - 518) / 518] x 100
Subtract the new number by the original number
430 - 518 = -88
-88 ÷ 518 = -0.16988416988416988
-0.16988416988416988 x 100 = -16.99%