20.47% is the change from 337 to 406
Calculation steps:
[( 406 - 337 ) ÷ 337] x 100 = 20.47%
Formula
Percentage change = [(406 - 337) / 337] x 100
Subtract the new number by the original number
406 - 337 = 69
69 ÷ 337 = 0.20474777448071216
0.20474777448071216 x 100 = 20.47%