About the Random Fraction Generator
This random fraction generator makes a list of fractions that follow rules you set. Choose how many you want, the largest top number and the largest bottom number, and whether to keep only proper fractions (smaller than one), only fractions already in lowest terms, or to allow negative fractions. Each fraction is shown with its decimal value next to it, and the whole list can be copied in one tap. Teachers, parents and students use it to create practice questions for comparing, adding, simplifying and converting fractions.
Updated October 2026
How to use the Random Fraction Generator
- 1Enter how many fractions you want, from 1 to 500.
- 2Set the largest top number and the largest bottom number.
- 3Tick the options you need: proper fractions, lowest terms or negative fractions.
- 4Press Generate fractions.
- 5Read the list with decimals, or press Copy list. Press the button again for a fresh set.
Activities to try with random fractions
- Order the fractions from smallest to largest.
- Simplify each fraction to lowest terms.
- Convert each to a decimal and a percentage.
- Pick two fractions and add, subtract, multiply or divide them.
- Play a card game: the player with the larger fraction wins the round.
Choosing sensible limits
For younger learners, keep both limits at 10 or below and tick proper fractions. For comparing and ordering, use denominators up to 12, which are common in recipes and measurements. For simplifying, leave the lowest terms option off and use even denominators, since they create more reducible fractions. For harder problems, raise the limits to 20 or 50 and allow negatives. If you need exactly the numbers you choose rather than random ones, type them into the Fraction Calculator instead.
Tools that pair well
The Fraction Calculator does the arithmetic once you have your list, the Decimal to Fraction Converter turns the decimals back into fractions, the GCF and LCM Calculator finds common factors for simplifying, and the Percentage Calculator handles conversions to percent. The Random Number Generator helps when you need whole numbers, and the Dice Roller adds a game element to practice.
Features
- 1 to 500 fractions at a time
- Limits for numerator and denominator up to 100,000
- Proper fractions only, if you want
- Lowest terms only, so none can be simplified
- Negative fractions on request
- Decimal value shown for each fraction
- Copy the whole list
Frequently asked questions
What is a proper fraction?
A proper fraction has a top number smaller than its bottom number, so its value is less than one, for example 3/8. Fractions like 9/4 are improper and can be written as mixed numbers such as 2 1/4. Tick the proper fractions option if you only want values below one.
What does lowest terms mean?
A fraction is in lowest terms, or simplest form, when the top and bottom share no common factor except 1. For instance 6/8 simplifies to 3/4, so only 3/4 is in lowest terms. The option keeps the list free of fractions that can be reduced.
Can the generator make fractions that need simplifying?
Yes. Leave the lowest terms option off and you will see a mix, such as 4/12, which simplifies to 1/3. This is useful for practising simplification, where students must spot common factors.
Why is the smallest denominator 2?
A denominator of 1 would make every fraction a whole number, such as 5/1, which is not a useful practice fraction. The generator starts at 2 so all results are genuine fractions.
Are the fractions truly random?
They come from your browser's random number generator, which is good for classroom practice and games but not for security. Each press of the button gives a new set, and repeated fractions can happen by chance when the limits are small.
How can I use the list in a worksheet?
Press Copy list and paste it into a document or spreadsheet. You can then ask students to simplify each fraction, convert it to a decimal or percentage, put the fractions in order, or add pairs. The decimals shown help you check answers.