-2.77% is the change from 577 to 561
Calculation steps:
[( 561 - 577 ) ÷ 577] x 100 = -2.77%
Formula
Percentage change = [(561 - 577) / 577] x 100
Subtract the new number by the original number
561 - 577 = -16
-16 ÷ 577 = -0.02772963604852686
-0.02772963604852686 x 100 = -2.77%