18.82% is the change from 340 to 404
Calculation steps:
[( 404 - 340 ) ÷ 340] x 100 = 18.82%
Formula
Percentage change = [(404 - 340) / 340] x 100
Subtract the new number by the original number
404 - 340 = 64
64 ÷ 340 = 0.18823529411764706
0.18823529411764706 x 100 = 18.82%