[tex] \frac{1}{2} + \frac{5}{6} \times \frac{1}{2} - 0.1(5) = \frac{1}{2} + \frac{5}{6} \times \frac{1}{2} - \frac{14}{90 } = \frac{1}{2} + \frac{5 \times 1}{6 \times2 } - \frac{14}{90} = \frac{1}{2} + \frac{5}{12} - \frac{14}{90} = \frac{1}{2} + \frac{5}{12} - \frac{7}{45} = \frac{137}{180} [/tex]
