18.42% is the change from 342 to 405
Calculation steps:
[( 405 - 342 ) ÷ 342] x 100 = 18.42%
Formula
Percentage change = [(405 - 342) / 342] x 100
Subtract the new number by the original number
405 - 342 = 63
63 ÷ 342 = 0.18421052631578946
0.18421052631578946 x 100 = 18.42%