How do you do equations with rational number

1) if it's a decimal than u don't have to do much just do it normally.

2) if it a fraction, turn it into a decimal and do it. but u can do it as a fraction too.

3) if it's a mixed number turn it into decimal or improper fraction and do what ur suppose to do.

*it's you choice. chose either decimal or fraction. it's ur choice. do wuts easier for u.