\(\dfrac{4}{5}\) \(\times\) \(\dfrac{6}{7}\) + \(\dfrac{2}{3}\)
= \(\dfrac{24}{35}\) + \(\dfrac{2}{3}\)
= \(\dfrac{72}{105}\) + \(\dfrac{70}{105}\)
= \(\dfrac{142}{105}\)
\(\dfrac{3}{4}\) + \(\dfrac{1}{2}\): \(\dfrac{5}{6}\)
= \(\dfrac{3}{4}\) + \(\dfrac{1}{2}\) \(\times\) \(\dfrac{6}{5}\)
= \(\dfrac{3}{4}\) + \(\dfrac{3}{5}\)
= \(\dfrac{15}{20}\) + \(\dfrac{12}{20}\)
= \(\dfrac{27}{20}\)