Show the working · not just the answer
Subtract fractions, step by step.
Subtract one fraction from another with every step shown — common denominator, the subtraction, and simplification, including negative results.
Enter your fractions
Tip: type 1 1/2 for mixed numbers. Steps update as you type.
Subtracting fractions works just like adding them: get a common denominator first, then subtract the numerators. The result can be negative, and FractionSteps handles that correctly.
Each step is written out so learners see the method, not just the final number.
Worked examples
Frequently asked
How do you subtract fractions with unlike denominators?
Find the least common denominator, rewrite both fractions over it, subtract the numerators, and simplify.
What if the answer is negative?
That is fine — if the second fraction is larger, the result is negative. The calculator keeps the sign and shows it clearly.
Can I subtract mixed numbers?
Yes. Enter values like 2 1/3 and they are converted to improper fractions before subtracting.