311.76% is the change from 221 to 910
Calculation steps:
[( 910 - 221 ) ÷ 221] x 100 = 311.76%
Formula
Percentage change = [(910 - 221) / 221] x 100
Subtract the new number by the original number
910 - 221 = 689
689 ÷ 221 = 3.1176470588235294
3.1176470588235294 x 100 = 311.76%