Answer
Reciprocal
Work Step by Step
When you invert or flip a fraction, you have the reciprocal of the fraction.
Remember, that the product of a number $a$ and its reciprocal is 1. Therefore, the reciprocal of $a$ must be $\frac{1}{a}$ (which is just $a$ flipped), so that $a\times\frac{1}{a}=1$.
