分数计算器

Use this free fraction calculator to add, subtract, multiply, divide, and simplify fractions with step-by-step work.
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关于分数计算

分数表示一个整数的一部分，在数学中非常重要。

运算：

  • 加法：通分，分子相加
  • 减法：通分，分子相减
  • 乘法：分子分母分别相乘
  • 除法：乘以倒数（颠倒后相乘）

分数类型：

  • 真分数：分子小于分母 (3/4)
  • 假分数：分子大于分母 (7/4)
  • 带分数：整数和分数 (1 3/4)
  • 等价分数：值相同，数字不同 (1/2 = 2/4)

始终将分数简化为最简形式，以获得最准确的表示。

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How our fraction calculator works

1

Enter your fractions

Type the numerators and denominators. We support proper fractions, improper fractions, mixed numbers, and decimals.

2

Pick an operation

Add, subtract, multiply, divide, simplify, or convert between forms. Each operation uses the standard math algorithm with step-by-step display.

3

Get the simplified result

See the answer in lowest terms, as a mixed number, and as a decimal. The fraction calculator also shows the common denominator used in the work.

Key things to know about our fraction calculator:

  • Finding common denominators: For 1/4 + 1/6, the LCD is 12, giving 3/12 + 2/12 = 5/12. Our fraction calculator handles this automatically for any denominator.
  • Mixed numbers: An improper fraction like 7/4 is shown as the mixed number 1 3/4 for easier reading. Switch formats in the result panel.
  • Use with decimals: For terminating and repeating decimal conversions, use the decimal to fraction calculator alongside the fraction calculator.

For related calculations, try our decimal to fraction calculator.