-13.64% is the change from 579 to 500
Calculation steps:
[( 500 - 579 ) ÷ 579] x 100 = -13.64%
Formula
Percentage change = [(500 - 579) / 579] x 100
Subtract the new number by the original number
500 - 579 = -79
-79 ÷ 579 = -0.13644214162348878
-0.13644214162348878 x 100 = -13.64%