To reduce a rational number to its standard form, we divide its numerator and denominator by their _________.

A rational number can be expressed as the ratio of two integers, such as a/b where a and b are integers and b is not equal to zero.

A rational number is reduced to its standard form by dividing its numerator and denominator by their respective HCFs (Highest Common Factor). As a result, the denominator is positive, and the common factor of the numerator and denominator is always 1.