-53.67% is the change from 518 to 240
Calculation steps:
[( 240 - 518 ) ÷ 518] x 100 = -53.67%
Formula
Percentage change = [(240 - 518) / 518] x 100
Subtract the new number by the original number
240 - 518 = -278
-278 ÷ 518 = -0.5366795366795367
-0.5366795366795367 x 100 = -53.67%