Fraction Calculator

It adds, subtracts, multiplies and divides two fractions and shows the result in lowest terms. For example, 2 by 3 plus 3 by 4 gives 17 by 12, which is also 1 and 5 by 12. It also converts the answer to a decimal so you can sanity-check the value at a glance.

Split it into whole and fraction parts in the input boxes, or convert it to an improper fraction yourself: 2 and 1 by 4 becomes 9 by 4. The calculator shows the final answer both as an improper fraction and as a mixed number, whichever is easier to read for your homework.

Negative signs are handled correctly. Enter minus 3 by 5 minus 1 by 5 and the result is minus 4 by 5. The sign always sits on the numerator in the display, so you will not see minus signs in two places. This matches how fractions are written in most Indian school textbooks.

If the question gives fractions, keep your answer as a fraction in lowest terms unless it asks for a decimal. Exact fractions like 1 by 3 are more precise than 0.333. In daily life : measuring milk or fuel : decimals are friendlier, but in maths, science and accounting, fractions usually win.

Sometimes a textbook leaves the answer as 4 by 6 instead of reducing to 2 by 3, or the other way round. This calculator always reduces fully using the highest common factor. So 4 by 6 is shown as 2 by 3. Both forms are mathematically equal; the lowest-terms form is just the standard.

Yes. If a recipe scales up from serving 4 to serving 10 and uses 1 by 2 cup sugar, multiply 1 by 2 by 10 by 4 to get 5 by 4, or 1 and 1 by 4 cups. The calculator handles this in one step and gives a decimal too, which is easier when your measuring cup only shows decimals.