12+89\dfrac{1}{2} + \dfrac{8}{9}
12+89\dfrac{1}{2} + \dfrac{8}{9}
Since these fractions have different denominators, we need to find the least common multiple of the denominators
The least common multiple of 2 and 9 is 18, so we need to multiply to make each of the denominators = 18
12∗99=918\dfrac{1}{2} * \dfrac{9}{9} = \dfrac{9}{18}
89∗22=1618\dfrac{8}{9} * \dfrac{2}{2} = \dfrac{16}{18}
Since these fractions have the same denominator, we can just add the numerators
918+1618=2518\dfrac{9}{18} + \dfrac{16}{18} = \dfrac{25}{18}
Because 2518\dfrac{25}{18} is an improper fraction (the numerator is greater than the denominator), we need to convert it to a mixed number
2518=1718\dfrac{25}{18} = 1\dfrac{7}{18}