-72.9% is the change from 823 to 223
Calculation steps:
[( 223 - 823 ) ÷ 823] x 100 = -72.9%
Formula
Percentage change = [(223 - 823) / 823] x 100
Subtract the new number by the original number
223 - 823 = -600
-600 ÷ 823 = -0.7290400972053463
-0.7290400972053463 x 100 = -72.9%