-31.3% is the change from 821 to 564
Calculation steps:
[( 564 - 821 ) ÷ 821] x 100 = -31.3%
Formula
Percentage change = [(564 - 821) / 821] x 100
Subtract the new number by the original number
564 - 821 = -257
-257 ÷ 821 = -0.31303288672350793
-0.31303288672350793 x 100 = -31.3%