I ended up forgetting how to do this over the weekend, if someone could kinda explain how to do it that would be nice!

Answer:
Ok, so rational applies to numbers that can be expressed as the quotient or fraction of two integers. An example of a rational number is 1.75, 1/100, or 0.09
An irrational number are numbers that cannot be expressed as the ratio of two integers. Some examples are, √5 or π.
Step-by-step explanation: