-13.45% is the change from 580 to 502
Calculation steps:
[( 502 - 580 ) ÷ 580] x 100 = -13.45%
Formula
Percentage change = [(502 - 580) / 580] x 100
Subtract the new number by the original number
502 - 580 = -78
-78 ÷ 580 = -0.13448275862068965
-0.13448275862068965 x 100 = -13.45%