Question

The reciprocal of $\frac{5}{9}$ is ___. (Write a/b as ab)

Answer 1

The reciprocal of a number is 1 divided by the number. The reciprocal of a number is also called its multiplicative inverse. The product of a number and its reciprocal is 1.
So, the reciprocal of $\frac{5}{9}$ is $\frac{9}{5}$.