Fraction Calculator

📖 Introduction

Fraction arithmetic is where upper primary and lower secondary students slip up most often: picking the wrong common denominator, forgetting to turn a mixed number into an improper fraction, leaving the answer unreduced, or losing track of a minus sign. This tool puts addition, subtraction, multiplication, division, simplification, common denominators and comparison of fractions onto a single page. You fill in numerators and denominators, pick an operation, and the answer appears immediately as a fully reduced fraction, together with the same value written as a mixed number, a decimal and a percentage, plus a step by step breakdown of the common denominator and the arithmetic itself. Whether you are checking homework, marking exercises or preparing a worksheet, you can see exactly where every intermediate value comes from. Every calculation happens locally in your browser and nothing you type ever leaves your device. The step panel is what makes this more than a plain answer box: it prints the common denominator it chose, the converted numerators, and the raw fraction before reduction, so a student can compare their own working line by line and see exactly where a mistake crept in. Teachers find it useful for preparing worked examples, because the same numbers can be shown in four equivalent forms without redoing any arithmetic by hand. Parents marking homework can enter the question once and check both the final answer and the intermediate steps. Because everything is computed in the browser, there is no waiting and no data ever leaves the device, which makes it safe to use on a school tablet. Dividing by a fraction is handled by inverting the second operand and multiplying, and the step panel shows that inversion explicitly, which is the part most often skipped in a student working. Comparison mode reports the two decimal values alongside the inequality sign so the conclusion can be checked independently.

✨ Features

• Add, subtract, multiply and divide two fractions with automatic reduction to lowest terms.
• Simplify a single fraction by entering just its numerator and denominator.
• Find a common denominator for two fractions and see both converted values.
• Compare two fractions and get a clear greater than, less than or equal result.
• Every answer is shown as a mixed number, a decimal and a percentage at the same time.
• An optional step by step panel makes the working easy to check and to explain.

🚀 How to use

1. Type the numerator and denominator of the first fraction.
2. Choose add, subtract, multiply, divide, simplify, common denominator or compare.
3. When two fractions are needed, fill in the second pair of fields as well.
4. Tick the output forms you want, such as mixed number, decimal or percentage.
5. Press the example button to auto fill a typical calculation and try it out.

⚠️ Notes

• Zero denominator. A denominator of zero is rejected with an explicit message rather than a wrong answer.
• Negative signs. A minus sign on either numerator or denominator is normalised onto the numerator.
• Lowest terms. Every result is divided through by the greatest common divisor, so it is always simplest.
• Decimal precision. Decimals are shown to six places, so recurring decimals are truncated there.
• Input range. Integer numerators and denominators are recommended; very large values may lose precision.