Daily Figures Edition No Sign-Up • No Tracking • Free Forever Vol. XII — No. 204
plaincalculators.com
Plain Calculators
“The figures, plainly worked — a standing desk of free, no-nonsense calculators.”
Monday, July 20, 2026 Mathematics Price: Free Runs In Your Browser
Find a calculator
Math — Arithmetic

Fraction Calculator

Add, subtract, multiply or divide two fractions and get the simplified result, decimal and mixed number.

Filed by The Statistics Desk  |  Method: common denominator + GCD
Result
—
Simplified fraction.
Readout
Decimal—
Mixed number—
Before simplifying—
Show our math
Enter your figures above to see the step-by-step working.
Everything computed client-sideEverything computed client-side — nothing leaves this page

How the Fraction Calculator Works

This calculator adds, subtracts, multiplies or divides two fractions and reduces the answer to lowest terms. Adding or subtracting first puts both fractions over a common denominator; multiplying goes straight across the tops and bottoms; dividing flips the second fraction and multiplies.

Whatever the operation, the result is then simplified by dividing the numerator and denominator by their greatest common divisor (GCD), and shown as a decimal and, where it applies, a mixed number. Enter whole numbers in each box — the denominators cannot be zero.

a/b ± c/d = (a·d ± c·b) / (b·d)

Frequently Asked Questions

How do you add fractions with different denominators?

Put them over a common denominator — the product of the two denominators always works — then add the numerators. This calculator does that and then reduces the result to lowest terms.

How do you divide fractions?

Keep the first fraction, flip the second (its reciprocal) and multiply. Dividing by 1/6, for example, is the same as multiplying by 6.

What does simplifying a fraction mean?

It means dividing the top and bottom by their greatest common divisor so the fraction is in its smallest whole-number form — for example 6/8 simplifies to 3/4.

More From The Desk

Same plain method, different figures