Adding Fractions Calculator
Add any two fractions — even with different denominators — and see every step: the LCD, the converted fractions, and the fully simplified result.
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What Does This Tool Do?
Enter two fractions with any denominators and get the simplified sum instantly. The tool uses the LCD (Lowest Common Denominator) method and shows every step so you can learn and verify.
Key Features
LCD Method
Finds the lowest common denominator automatically.
Auto-Simplified
Result always reduced to lowest terms using GCD.
Full Steps
Every conversion and addition step displayed.
Instant
Answer appears immediately on click.
How to Use
- Enter the numerator and denominator for each fraction.
- Click Add Fractions.
- Read the LCD, converted fractions and simplified result.
Frequently Asked Questions
What is the LCD method for adding fractions?▾
LCD (Lowest Common Denominator) is the smallest number both denominators divide into evenly. Once both fractions share the LCD, you simply add the numerators.
Can I add fractions with the same denominator?▾
Yes — if denominators match, the calculator still works correctly and just adds numerators directly.
What does simplified mean?▾
The result is divided by the GCD of numerator and denominator until no common factor remains — e.g. 6/8 simplifies to 3/4.