Subtract Fractions Calculator

Use our free subtract fractions calculator to subtract one fraction from another. Get the difference as both a simplified fraction and a decimal value.

Math

First Numerator (A)

First Denominator (B)

Second Numerator (C)

Second Denominator (D)

Formula

Subtract one fraction from another using cross-multiplication: a/b - c/d = (a×d - b×c) / (b×d). The result is automatically simplified.

A/B − C/D = (A×D − B×C) / (B×D)

Percentage: The percentage value you want to apply

Number: The original number or value

Result: The calculated result

How It Works

1Enter the numerator and denominator for the first fraction.
2Enter the numerator and denominator for the fraction to subtract.
3Click Calculate to get the difference as a simplified fraction and decimal.

Examples

Subtract 1/4 from 3/4

1.Same denominator: 4.
2.Subtract numerators: 3 - 1 = 2.
3.Result: 2/4.
4.Simplify: GCD of 2 and 4 is 2.
5.Simplified: 1/2.
6.Decimal: 0.5.

Result: 0.5 (1/2)

Frequently Asked Questions

Find the common denominator by multiplying both denominators, cross-multiply the numerators, then subtract. Simplify the result.

Yes, if the first fraction is smaller than the second, the result will be a negative fraction.

Related Calculators

Add Fractions Calculator Fraction Calculator Fraction Simplifier Decimal to Fraction Calculator Percentage Calculator Basic Calculator

CalculateMe Team

Last updated: 2026-07-13

Subtract Fractions Calculator

Formula

How It Works

Examples

Subtract 1/4 from 3/4

Frequently Asked Questions

How do you subtract fractions with different denominators?

Can the result be negative?

Related Calculators

Subtract Fractions Calculator

Formula

How It Works

Examples

Subtract 1/4 from 3/4

Frequently Asked Questions

How do you subtract fractions with different denominators?

Can the result be negative?

Related Calculators