17.97% is the change from 345 to 407
Calculation steps:
[( 407 - 345 ) ÷ 345] x 100 = 17.97%
Formula
Percentage change = [(407 - 345) / 345] x 100
Subtract the new number by the original number
407 - 345 = 62
62 ÷ 345 = 0.17971014492753623
0.17971014492753623 x 100 = 17.97%