18.37% is the change from 343 to 406
Calculation steps:
[( 406 - 343 ) ÷ 343] x 100 = 18.37%
Formula
Percentage change = [(406 - 343) / 343] x 100
Subtract the new number by the original number
406 - 343 = 63
63 ÷ 343 = 0.1836734693877551
0.1836734693877551 x 100 = 18.37%