-34.1% is the change from 519 to 342
Calculation steps:
[( 342 - 519 ) ÷ 519] x 100 = -34.1%
Formula
Percentage change = [(342 - 519) / 519] x 100
Subtract the new number by the original number
342 - 519 = -177
-177 ÷ 519 = -0.34104046242774566
-0.34104046242774566 x 100 = -34.1%