# How do you write the reciprocal number of 7/2?

The reciprocal of $\frac{7}{2}$ is $\frac{2}{7}$.
A reciprocal of a fraction $\frac{a}{b}$ is created by changing places of numerator and denominator (it can only be done if the numerator of the original fraction $a$ is different from zero), so it is $\frac{b}{a}$.
So in the given example the reciprocal of $\frac{7}{2}$ is $\frac{2}{7}$.