109.4% is the change from 234 to 490
Calculation steps:
[( 490 - 234 ) ÷ 234] x 100 = 109.4%
Formula
Percentage change = [(490 - 234) / 234] x 100
Subtract the new number by the original number
490 - 234 = 256
256 ÷ 234 = 1.0940170940170941
1.0940170940170941 x 100 = 109.4%