18.66% is the change from 343 to 407
Calculation steps:
[( 407 - 343 ) ÷ 343] x 100 = 18.66%
Formula
Percentage change = [(407 - 343) / 343] x 100
Subtract the new number by the original number
407 - 343 = 64
64 ÷ 343 = 0.18658892128279883
0.18658892128279883 x 100 = 18.66%