Math
Fraction Calculator
Work with fractions in the direction you need: operate on two fractions, simplify one fraction, compare two fractions, or turn a decimal into a clean fraction.
Result (simplified)
—
- Mixed number
- —
- Decimal
- —
- Percent
- —
Student quick launch
Grade planning, algebra checks, and formulas students reach for most.
Study path
Use this calculator with
Follow these when you want the formula behind the answer, a short lesson, or nearby tools in the same topic.
What this fraction calculator can solve
| Mode | Use it when | Output |
|---|---|---|
| Operate | You need to add, subtract, multiply, or divide fractions | Simplified answer, decimal, percent, mixed number, and steps |
| Simplify | You need a fraction in lowest terms | GCD, simplified form, mixed number, and decimal |
| Compare | You need to know which fraction is larger | Cross-products, comparison sign, and difference |
| Decimal to fraction | You have a decimal answer | Closest fraction within the denominator limit |
Adding and subtracting fractions
Use a common denominator, then combine the numerators. The calculator also shows the common denominator and simplifies the result.
Multiplying and dividing fractions
Multiplication goes straight across. Division means multiply by the reciprocal of the second fraction.
Simplifying fractions
A fraction is simplified when the numerator and denominator have no common factor greater than 1. Divide both by the greatest common divisor.
Worked examples
1/2 + 1/3
Add with a common denominator
Result (simplified)
5/6
3/4 x 2/5
Multiply straight across
Result (simplified)
3/10
Simplify 42/56
Reduce to lowest terms
Result (simplified)
3/4
Compare 5/8 and 3/5
Use cross-products
Result (simplified)
1/40
0.375 as a fraction
Convert decimal to exact fraction
Result (simplified)
3/8
Frequently asked questions
Does this handle negative fractions?+
Yes. Enter the negative sign in the numerator. The calculator normalizes signs so the denominator stays positive.
What is a mixed number?+
A mixed number writes an improper fraction as a whole number plus a proper fraction. For example, 7/3 is 2 1/3.
How do I compare fractions?+
Cross-multiply. For a/b and c/d, compare a x d with c x b. The larger cross-product belongs to the larger fraction.
Why is my decimal-to-fraction result approximate?+
Some decimals repeat forever or need a large denominator. Increase the maximum denominator for a closer match.
Related calculators
Percentage Calculator
Calculate percent of a number, part-to-whole percentages, percent change, missing wholes, and reverse percent changes.
Discount Calculator
Calculate sale price, stacked discounts, original price before a discount, or the discount percent between two prices.
GPA Calculator
Calculate semester GPA, update cumulative GPA, or find the future grade average needed to reach a target GPA.
Slope Calculator
Find slope from two points or solve a missing coordinate from a known slope. Includes equations, intercepts, grade, graph, and step-by-step work.
Arc Length Calculator
Calculate arc length from radius and central angle in degrees.
Area Calculator
Find the area of rectangles, triangles, circles, trapezoids, and parallelograms with formulas and unit-aware steps.
Last updated: May 8, 2026