115% is the change from 340 to 731
Calculation steps:
[( 731 - 340 ) ÷ 340] x 100 = 115%
Formula
Percentage change = [(731 - 340) / 340] x 100
Subtract the new number by the original number
731 - 340 = 391
391 ÷ 340 = 1.15
1.15 x 100 = 115%
Example