\(7+\dfrac{12}{5}=\dfrac{35}{5}+\dfrac{12}{5}=\dfrac{47}{5}\)
\(2:\dfrac{2}{7}+\dfrac{12}{5}=2\times\dfrac{7}{2}+\dfrac{12}{5}=7+\dfrac{12}{5}=\dfrac{35}{5}+\dfrac{12}{5}=\dfrac{47}{5}\)
2 : 2/7 + 12/5
= 2 x 7/2 + 12/5
= 7 + 12/5
= 35/7 + 12/5
=47/5