-30.64% is the change from 816 to 566
Calculation steps:
[( 566 - 816 ) ÷ 816] x 100 = -30.64%
Formula
Percentage change = [(566 - 816) / 816] x 100
Subtract the new number by the original number
566 - 816 = -250
-250 ÷ 816 = -0.30637254901960786
-0.30637254901960786 x 100 = -30.64%