217.59% is the change from 290 to 921
Calculation steps:
[( 921 - 290 ) ÷ 290] x 100 = 217.59%
Formula
Percentage change = [(921 - 290) / 290] x 100
Subtract the new number by the original number
921 - 290 = 631
631 ÷ 290 = 2.1758620689655173
2.1758620689655173 x 100 = 217.59%