Why is a mixed number a rational number

A mixed number is a rational number because you still say it the same way as every other rational number and because it can be written like a fraction and with :.

Any number that can be rewritten as a simple fraction is a rational number. This means that natural numbers, wholenumbers and integers, like 5, are all part of the set of rational numbers as well because they can be written as fractions, as are mixed numbers like 1 ½.