-18.5% is the change from 519 to 423
Calculation steps:
[( 423 - 519 ) ÷ 519] x 100 = -18.5%
Formula
Percentage change = [(423 - 519) / 519] x 100
Subtract the new number by the original number
423 - 519 = -96
-96 ÷ 519 = -0.18497109826589594
-0.18497109826589594 x 100 = -18.5%