13+38\dfrac{1}{3} + \dfrac{3}{8}
13+38\dfrac{1}{3} + \dfrac{3}{8}
Since these fractions have different denominators, we need to find the least common multiple of the denominators
The least common multiple of 3 and 8 is 24, so we need to multiply to make each of the denominators = 24
1388=824\dfrac{1}{3} * \dfrac{8}{8} = \dfrac{8}{24}
3833=924\dfrac{3}{8} * \dfrac{3}{3} = \dfrac{9}{24}
Since these fractions have the same denominator, we can just add the numerators
824+924=1724\dfrac{8}{24} + \dfrac{9}{24} = \dfrac{17}{24}