-72.84% is the change from 821 to 223
Calculation steps:
[( 223 - 821 ) ÷ 821] x 100 = -72.84%
Formula
Percentage change = [(223 - 821) / 821] x 100
Subtract the new number by the original number
223 - 821 = -598
-598 ÷ 821 = -0.728380024360536
-0.728380024360536 x 100 = -72.84%