First make it that both denominators are the same. [tex] (\frac{1}{2} \times 5) + ( \frac{2}{5} \times 2) = \frac{5}{10} + \frac{4}{10} [/tex] Then add both numerators [tex] \frac{5}{10} + \frac{4}{10} = \frac{9}{10} [/tex] Your final answer should be [tex] \frac{9}{10} [/tex]