`1 5/6-9/13=11/6-9/13=143/78-54/78=89/78`
\(=\dfrac{11}{6}-\dfrac{9}{13}=\dfrac{143}{78}-\dfrac{54}{78}=\dfrac{89}{78}\)
=\(\dfrac{11}{6}\)-\(\dfrac{9}{13}\)
=\(\dfrac{143}{78}\)-\(\dfrac{54}{78}\)
=\(\dfrac{89}{78}\)
1\(\dfrac{5}{6}\)- \(\dfrac{9}{13}\) = \(\dfrac{11}{6}\) - \(\dfrac{9}{13}\) = \(\dfrac{89}{78}\)