-42.49% is the change from 539 to 310
Calculation steps:
[( 310 - 539 ) ÷ 539] x 100 = -42.49%
Formula
Percentage change = [(310 - 539) / 539] x 100
Subtract the new number by the original number
310 - 539 = -229
-229 ÷ 539 = -0.424860853432282
-0.424860853432282 x 100 = -42.49%