[tex]( \frac{3}{16} + \frac{1}{4} ) *8

[/tex]
[tex]( \frac{3}{16} + \frac{1}{4} ) * 8

[/tex]

= (3/16 + 4/16) * 8 = 7/16 * 8 = 7/2 = 3 1/2 = 3,5----------------------------------------------------------