45.3% is the change from 234 to 340
Calculation steps:
[( 340 - 234 ) ÷ 234] x 100 = 45.3%
Formula
Percentage change = [(340 - 234) / 234] x 100
Subtract the new number by the original number
340 - 234 = 106
106 ÷ 234 = 0.452991452991453
0.452991452991453 x 100 = 45.3%