\(=\dfrac{112}{72}-\dfrac{45}{72}=\dfrac{67}{72}\)
\(=\dfrac{45}{24}-\dfrac{10}{24}=\dfrac{35}{24}\)
\(\dfrac{14}{9}-\dfrac{5}{8}=\dfrac{112}{72}-\dfrac{45}{72}=\dfrac{67}{72}\)
\(\dfrac{15}{8}-\dfrac{5}{12}=\dfrac{60}{24}-\dfrac{10}{24}=\dfrac{50}{24}=\dfrac{25}{12}\)
14/9 - 5/8 = 112/72 - 45/72 = 67/72
15/8 - 5/12 = 180/96 - 40/96 = 140/96