What: A numerical quantity that is not a whole number ( example: 1/2).
Where: Fractions can be found in recipes (example: 1/4 tablespoon of salt).
When: We use fractions when we are cooking (see above for example).
Who: Fractions are used by chefs.
Why: We use fractions because it is better than decimal because when we write decimals, our dot might not be seen clearly.