No.
![5 (1)/(3)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/gvo8mqdtjie3vja14x4b8penu2gxkh0tlq.png)
- First, it is actually a rational number since it can be in a fraction form.
- Second, it can be turn into a/b where b≠0
So we can turn from 5 1/3 to 16/3
Note that 16/3 makes infinity decimal but if the infinity decimal can be turnt into a fraction, it will be classified as rational number.