110.34% is the change from 290 to 610
Calculation steps:
[( 610 - 290 ) ÷ 290] x 100 = 110.34%
Formula
Percentage change = [(610 - 290) / 290] x 100
Subtract the new number by the original number
610 - 290 = 320
320 ÷ 290 = 1.103448275862069
1.103448275862069 x 100 = 110.34%