-30.28% is the change from 720 to 502
Calculation steps:
[( 502 - 720 ) ÷ 720] x 100 = -30.28%
Formula
Percentage change = [(502 - 720) / 720] x 100
Subtract the new number by the original number
502 - 720 = -218
-218 ÷ 720 = -0.30277777777777776
-0.30277777777777776 x 100 = -30.28%