[tex] \frac{3}{6} + \frac{3}{8} [/tex]
Make the denominators the same
Multiply the first fraction by 4, second fraction by 3 to get the same denominator
[tex] \frac{12}{24} + \frac{9}{24} [/tex]
Add the numerators, denominators stay the same
[tex] \frac{21}{24} [/tex]
Divide by 3 to numerator and denominator to simplify to lowest fraction
[tex] \frac{7}{8} [/tex]