-73.1% is the change from 829 to 223
Calculation steps:
[( 223 - 829 ) ÷ 829] x 100 = -73.1%
Formula
Percentage change = [(223 - 829) / 829] x 100
Subtract the new number by the original number
223 - 829 = -606
-606 ÷ 829 = -0.7310012062726177
-0.7310012062726177 x 100 = -73.1%