-6.46% is the change from 619 to 579
Calculation steps:
[( 579 - 619 ) ÷ 619] x 100 = -6.46%
Formula
Percentage change = [(579 - 619) / 619] x 100
Subtract the new number by the original number
579 - 619 = -40
-40 ÷ 619 = -0.06462035541195477
-0.06462035541195477 x 100 = -6.46%