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What This Calculator Does

This fraction calculator is best for three common jobs: reducing one fraction to lowest terms, performing arithmetic on two fractions, and comparing which of two fractions is larger. Depending on the mode, it can also show a mixed number, a decimal, and a percentage alongside the fraction result.

That makes it especially helpful for classroom practice, homework checks, and basic number-sense work. Many users do not only want the answer. They also want to know whether the result has been reduced, whether it can be read as a mixed number, and how it looks as a decimal. The page keeps those views together.

When to Use It

  • You want to reduce a fraction quickly.
  • You are practicing fraction addition, subtraction, multiplication, or division.
  • You need to compare which of two fractions is larger.
  • You want to see the same value as a mixed number, decimal, or percentage.

Inputs Explained

Mode

The page offers simplify, operation, and compare. Deciding which task you are doing first makes the later inputs clearer and reduces mistakes around the second fraction.

Numerators and Denominators

All fraction fields must be integers, and denominators cannot be 0. If you enter a negative denominator, the page normalizes the sign so the denominator remains positive in the displayed output. That keeps the results consistent and easier to compare.

詳しい使い方を見る

よくある質問

このツールはどのモードに対応していますか?

現在のページは、分数の約分、分数の四則演算、分数の比較に対応しています。

分子や分母に小数を入力できますか?

いいえ。現在のページでは、分子・分母とも整数のみ入力できます。

分母に負の数は使えますか?

はい。ただし、結果を表示する前に、符号は分子側に正規化されます。

ページは自動的に計算されますか?

はい。入力の変更に合わせて再計算され、ボタンでも同じ処理を明示的に実行できます。

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Fraction Calculator

Simplify fractions, compare two fractions, and perform fraction arithmetic with reduced results.

Fraction Input

Fraction Input

Enter integers only. Denominators cannot be zero.