276.02% is the change from 221 to 831
Calculation steps:
[( 831 - 221 ) ÷ 221] x 100 = 276.02%
Formula
Percentage change = [(831 - 221) / 221] x 100
Subtract the new number by the original number
831 - 221 = 610
610 ÷ 221 = 2.760180995475113
2.760180995475113 x 100 = 276.02%