-19.61% is the change from 561 to 451
Calculation steps:
[( 451 - 561 ) ÷ 561] x 100 = -19.61%
Formula
Percentage change = [(451 - 561) / 561] x 100
Subtract the new number by the original number
451 - 561 = -110
-110 ÷ 561 = -0.19607843137254902
-0.19607843137254902 x 100 = -19.61%