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Fraction Calculator

Add, subtract, multiply, or divide fractions with step-by-step solutions. Simplify and convert between fractions, decimals, and percentages.

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Enter both fractions to see the result.

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Decimal

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Percentage

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    Formulae

    a/b + c/d = (ad + bc) / bd

    a/b - c/d = (ad - bc) / bd

    a/b × c/d = ac / bd

    a/b ÷ c/d = ad / bc

    GCD = greatest common divisor (for simplification)

    LCD = least common denominator (for +/-)

    How to use

    1. 1

      Enter the first fraction

      Type the numerator and denominator into the top fraction fields. Toggle 'Mixed' to include a whole number part.

    2. 2

      Choose an operation

      Select add (+), subtract (-), multiply (x), or divide (/) using the operation buttons.

    3. 3

      Enter the second fraction

      Type the numerator and denominator into the bottom fraction fields.

    4. 4

      Read the result

      The simplified result appears instantly. Click 'Show steps' to see the full working, or use the conversion section to see the decimal and percentage equivalents.

    Frequently asked questions

    How do I add fractions with different denominators?
    Find the least common denominator (LCD), convert both fractions to equivalent fractions with that denominator, then add the numerators. This calculator does it automatically and shows the steps.
    How do I simplify a fraction?
    Divide both the numerator and denominator by their greatest common divisor (GCD). For example, 12/18 simplifies to 2/3 because GCD(12,18) = 6.
    What is a mixed number?
    A mixed number has a whole part and a fraction part, like 2 3/4. It equals the whole number plus the fraction (2 + 3/4 = 11/4 as an improper fraction).
    Is my data sent anywhere?
    No. All fraction calculations run entirely in your browser. Nothing is uploaded or stored.

    Solve fraction problems with four arithmetic operations and automatic

    simplification. Enter two fractions using numerator and denominator

    fields, choose an operation, and get the result reduced to lowest terms.

    Convert between fractions, decimals, and percentages. Mixed-number

    support lets you work with whole-and-fraction values. A step-by-step

    breakdown shows how the LCD was found and simplification applied. All

    processing runs in your browser — nothing is uploaded or stored.

    Related tools

    Percentage Calculator

    Calculate percentages instantly — find X% of Y, what percentage X is of Y, or the percentage change between two values.