Question

To reduce a rational number in its standard form, we divide the numerator and the denominator by their ___________ .

Answer 1

A rational number $\frac{p}{q}$ where q $\ne$ 0, is said to be in its standard form when p and q have no common factor other than 1.
So, we must divide p and q by their H.C.F. to convert $\frac{p}{q}$ into its standard form.

Therefore, option (b) is correct.