a.
\(\dfrac{4}{7}=\dfrac{4}{7}\)
\(2=\dfrac{2}{1}=\dfrac{2.7}{1.7}=\dfrac{14}{7}\)
b.
\(3=\dfrac{3}{1}=\dfrac{3.4}{1.4}=\dfrac{12}{4}\)
\(\dfrac{6}{8}=\dfrac{6:2}{8:2}=\dfrac{3}{4}\)
c.
\(4=\dfrac{4}{1}=\dfrac{4.12}{1.12}=\dfrac{48}{12}\)
\(\dfrac{5}{6}=\dfrac{5.2}{6.2}=\dfrac{10}{12}\)
d.
\(3=\dfrac{3}{1}=\dfrac{6}{2}=\dfrac{9}{3}=\dfrac{12}{4}=\dfrac{15}{5}=\dfrac{18}{6}\)