314.03% is the change from 221 to 915
Calculation steps:
[( 915 - 221 ) ÷ 221] x 100 = 314.03%
Formula
Percentage change = [(915 - 221) / 221] x 100
Subtract the new number by the original number
915 - 221 = 694
694 ÷ 221 = 3.1402714932126696
3.1402714932126696 x 100 = 314.03%