19.12% is the change from 340 to 405
Calculation steps:
[( 405 - 340 ) ÷ 340] x 100 = 19.12%
Formula
Percentage change = [(405 - 340) / 340] x 100
Subtract the new number by the original number
405 - 340 = 65
65 ÷ 340 = 0.19117647058823528
0.19117647058823528 x 100 = 19.12%