-30.83% is the change from 811 to 561
Calculation steps:
[( 561 - 811 ) ÷ 811] x 100 = -30.83%
Formula
Percentage change = [(561 - 811) / 811] x 100
Subtract the new number by the original number
561 - 811 = -250
-250 ÷ 811 = -0.3082614056720099
-0.3082614056720099 x 100 = -30.83%