-30.74% is the change from 810 to 561
Calculation steps:
[( 561 - 810 ) ÷ 810] x 100 = -30.74%
Formula
Percentage change = [(561 - 810) / 810] x 100
Subtract the new number by the original number
561 - 810 = -249
-249 ÷ 810 = -0.3074074074074074
-0.3074074074074074 x 100 = -30.74%