Question

Find the reciprocal ratio of $3x:\frac{1}{y}$

Answer 1

Use formula for reciprocal ratio of $a:b=b:a$.

Required reciprocal ratio = $$\begin{gathered} \frac{1}{y}:3x \\ =1:3xy \end{gathered}$$

Hence, Reciprocal ratio of $3x:\frac{1}{y}$ is $1:3xy$