\(=\dfrac{7}{15}+\left(\dfrac{5}{6}-\dfrac{2}{6}\right)=\dfrac{7}{15}+\dfrac{1}{2}=\dfrac{14}{30}+\dfrac{15}{30}=\dfrac{29}{30}\)
\(\dfrac{7}{15}+\left(\dfrac{5}{6}-\dfrac{1}{3}\right)=\dfrac{7}{15}+\left(\dfrac{5}{6}-\dfrac{2}{6}\right)=\dfrac{7}{15}+\dfrac{1}{2}=\dfrac{14}{30}+\dfrac{15}{30}=\dfrac{29}{30}\)
7/15 + ( 5/6 - 1/3 )
= 7/15 + ( 5/6 - 2/6 )
= 7/15 + 1/2
= 14/30 + 15/30
= 29/30.