Question

Which of the given pairs of rational numbers are equivalent?

$\frac{3}{7},\frac{15}{28}$

Answer 1

By multiplying the numerator and denominator of a rational number by the same non zero integer, we obtain another rational number equivalent to the given rational number is called equivalent rational number.

Or If $\frac{\mathrm{p}}{\mathrm{q}}$ is a rational number , then $\frac{\mathrm{p}\times \mathrm{k}}{\mathrm{q}\times \mathrm{k}}$ is its equivalent rational number, where $\mathrm{k}$ is a non zero integer.

So, let us use cross multiplication method,

$$\begin{gathered} \frac{3}{7},\frac{15}{28} \\ 3\times 28=7\times 15 \\ 84\ne 105 \end{gathered}$$

So it is not an equivalent pair.

Hence, No they are not equivalent rational number.