-13.3% is the change from 579 to 502
Calculation steps:
[( 502 - 579 ) ÷ 579] x 100 = -13.3%
Formula
Percentage change = [(502 - 579) / 579] x 100
Subtract the new number by the original number
502 - 579 = -77
-77 ÷ 579 = -0.13298791018998274
-0.13298791018998274 x 100 = -13.3%