-72.56% is the change from 831 to 228
Calculation steps:
[( 228 - 831 ) ÷ 831] x 100 = -72.56%
Formula
Percentage change = [(228 - 831) / 831] x 100
Subtract the new number by the original number
228 - 831 = -603
-603 ÷ 831 = -0.7256317689530686
-0.7256317689530686 x 100 = -72.56%