-55.56% is the change from 540 to 240
Calculation steps:
[( 240 - 540 ) ÷ 540] x 100 = -55.56%
Formula
Percentage change = [(240 - 540) / 540] x 100
Subtract the new number by the original number
240 - 540 = -300
-300 ÷ 540 = -0.5555555555555556
-0.5555555555555556 x 100 = -55.56%