-39.89% is the change from 539 to 324
Calculation steps:
[( 324 - 539 ) ÷ 539] x 100 = -39.89%
Formula
Percentage change = [(324 - 539) / 539] x 100
Subtract the new number by the original number
324 - 539 = -215
-215 ÷ 539 = -0.39888682745825604
-0.39888682745825604 x 100 = -39.89%