-3.11% is the change from 579 to 561
Calculation steps:
[( 561 - 579 ) ÷ 579] x 100 = -3.11%
Formula
Percentage change = [(561 - 579) / 579] x 100
Subtract the new number by the original number
561 - 579 = -18
-18 ÷ 579 = -0.031088082901554404
-0.031088082901554404 x 100 = -3.11%