-33.98% is the change from 518 to 342
Calculation steps:
[( 342 - 518 ) ÷ 518] x 100 = -33.98%
Formula
Percentage change = [(342 - 518) / 518] x 100
Subtract the new number by the original number
342 - 518 = -176
-176 ÷ 518 = -0.33976833976833976
-0.33976833976833976 x 100 = -33.98%