[tex] \dfrac{5}{8} - \dfrac{5}{12} ( 3 - \dfrac{1}{4} )+ \dfrac{2}{3} [/tex]
[tex] = \dfrac{5}{8} - \dfrac{5}{12} (2\dfrac{3}{4} )+ \dfrac{2}{3} [/tex]
[tex] = \dfrac{5}{8} - \dfrac{5}{12} (\dfrac{11}{4} )+ \dfrac{2}{3} [/tex]
[tex] = \dfrac{5}{8} - \dfrac{55}{48}+ \dfrac{2}{3} [/tex]
[tex] = \dfrac{30}{48} - \dfrac{55}{48}+ \dfrac{32}{48} [/tex]
[tex] = \dfrac{7}{48}[/tex]