315.38% is the change from 221 to 918
Calculation steps:
[( 918 - 221 ) ÷ 221] x 100 = 315.38%
Formula
Percentage change = [(918 - 221) / 221] x 100
Subtract the new number by the original number
918 - 221 = 697
697 ÷ 221 = 3.1538461538461537
3.1538461538461537 x 100 = 315.38%