-55.1% is the change from 539 to 242
Calculation steps:
[( 242 - 539 ) ÷ 539] x 100 = -55.1%
Formula
Percentage change = [(242 - 539) / 539] x 100
Subtract the new number by the original number
242 - 539 = -297
-297 ÷ 539 = -0.5510204081632653
-0.5510204081632653 x 100 = -55.1%