Fraction Calculator

Examples: 3/4, 1 1/2, -2, 0.25

Denominators cannot be zero

Simplified result
Improper fraction
Mixed number
Decimal
Percentage

Add, subtract, multiply, or divide fractions without converting them to rounded decimals first. Enter proper fractions, improper fractions, mixed numbers, integers, or finite decimals.

See how each answer is obtained: convert mixed numbers or decimals, use a common denominator or a reciprocal when needed, then simplify the result. Each input can contain up to 300 characters.

Accepted fraction formats

Use a slash for a fraction such as 7/8, a space for a mixed number such as 2 3/5, or enter an integer or finite decimal. A leading minus sign applies to the complete mixed number.

Exact fraction arithmetic

Addition and subtraction use a common denominator. Multiplication combines numerators and denominators, while division multiplies by the reciprocal and rejects a zero divisor. Every answer is normalized to a positive denominator.

How to calculate fractions

  1. Enter the two numbers as fractions, mixed numbers, integers, or decimals.
  2. Choose addition, subtraction, multiplication, or division. The result updates when both inputs are valid.
  3. Follow the calculation steps below the result. Copy Result includes the steps as well as the fraction and decimal answers.

Fraction calculator FAQ

How do I enter a negative mixed number?

Separate the whole number and fraction with a space, for example -1 1/2. The minus sign applies to the entire value: -(1 + 1/2) = -3/2.

How is the answer simplified?

The numerator and denominator are divided by their greatest common divisor. For example, 6/8 becomes 3/4 by dividing both by 2; a negative result keeps the minus sign in the numerator.

Are the fraction and decimal answers equally precise?

The fraction result is exact for the accepted inputs. The decimal display is rounded to at most 12 decimal places, so a repeating decimal such as 1/3 is shown approximately.

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