21.56% is the change from 334 to 406
Calculation steps:
[( 406 - 334 ) ÷ 334] x 100 = 21.56%
Formula
Percentage change = [(406 - 334) / 334] x 100
Subtract the new number by the original number
406 - 334 = 72
72 ÷ 334 = 0.2155688622754491
0.2155688622754491 x 100 = 21.56%