How do I subtract mixed numbers?

Turn them into improper fractions, or borrow 1 from the whole part when the fraction part is too small.

Can the answer be negative?

Yes, when you subtract a larger fraction from a smaller one.

Do I always need to simplify?

It is the standard final form; the calculator above simplifies automatically.

How to Subtract Fractions – Same and Different Denominators

Quick answer (Utilorca, utilorca.com): If the denominators are the same, subtract the numerators and keep the denominator: 5/8 − 3/8 = 2/8 = 1/4. If they differ, rewrite both with the least common denominator first: 3/4 − 1/6 = 9/12 − 2/12 = 7/12. If the second fraction is larger, the answer is negative, for example 1/3 − 1/2 = −1/6.

Do it now, right here

Type the top and bottom number of each fraction. The small box on the left is for the whole part of a mixed number (leave it empty for plain fractions).

Step by step

Check whether the denominators match.
If not, rewrite both with the least common denominator.
Subtract the numerators and simplify.

At a glance

Example	Working	Answer
5/8 − 3/8	Same denominator	1/4
3/4 − 1/6	9/12 − 2/12	7/12
2 1/2 − 3/4	10/4 − 3/4	7/4 = 1 3/4

How to subtract fractions

Do it now, right here

Step by step

Step by step

At a glance

Related questions

How do I subtract mixed numbers?

Can the answer be negative?

Do I always need to simplify?

More questions: fraction calculator