La Fonction

Division into fraction calculator

Any division is already a fraction: a divided by b is a over b. And to divide by a fraction you flip it and multiply, which is the step the boxes above handle.

12 × 12 = 144

Adding 12 to itself 12 times gives the same answer.

Turning the division into a fraction

The line in a fraction is a division sign. So 3 divided by 4 is 3/4, and nothing has to be worked out at all. A whole number becomes a fraction by putting 1 underneath it: 5 is 5/1. That one move is what makes the next step possible.

Dividing by a fraction: flip and multiply

To work out 3/4 divided by 2/5, turn the second fraction upside down and multiply instead: 3/4 × 5/2. Use the boxes above twice. Tops first, 3 × 5 = 15. Then bottoms, 4 × 2 = 8. The answer is 15/8, or 1 and 7/8.

Divided into is the other way round

This is where most wrong answers come from. 8 divided into 24 means 24 divided by 8, which is 3. Divided by keeps the order you read; divided into reverses it. If a question uses the word into and your answer came out smaller than 1 when it should not have, this is why.

Checking what you got

  • Multiply back. Put your answer and the number you divided by into the boxes. If the result is the number you started with, the division was right.
  • Reduce at the end. Divide top and bottom by the same number until nothing goes into both.
  • Top heavier than the bottom is fine. 15/8 is a real answer; convert it to a mixed number only if you were asked to.
  • Going the other way from a decimal is handled by the decimal to fraction calculator.

See also the whole number fraction calculator and solving for x in a fraction.