277.38% is the change from 221 to 834
Calculation steps:
[( 834 - 221 ) ÷ 221] x 100 = 277.38%
Formula
Percentage change = [(834 - 221) / 221] x 100
Subtract the new number by the original number
834 - 221 = 613
613 ÷ 221 = 2.773755656108597
2.773755656108597 x 100 = 277.38%