318.64% is the change from 220 to 921
Calculation steps:
[( 921 - 220 ) ÷ 220] x 100 = 318.64%
Formula
Percentage change = [(921 - 220) / 220] x 100
Subtract the new number by the original number
921 - 220 = 701
701 ÷ 220 = 3.1863636363636365
3.1863636363636365 x 100 = 318.64%