Fraction Calculator

The paragraph provided contains several fraction calculators designed for operations such as addition, subtraction, multiplication, division, simplification, and converting between fractions and decimals. The fields situated above the solid black line denote the numerator, whereas those below indicate the denominator.

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Mixed Numbers Calculator

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Simplify Fractions Calculator

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Decimal to Fraction Calculator

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Fraction to Decimal Calculator

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Big Number Fraction Calculator

Use this calculator if the numerators or denominators are very big integers.

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In the realm of mathematics, a fraction denotes a portion of an entirety. It comprises two components: a numerator and a denominator. The numerator signifies the quantity of equal portions of the entire, whereas the denominator indicates the complete number of portions that constitute that entirety. Taking the fraction


as an illustration, here 3 is the numerator and 8 is the denominator. Imagine a pie cut into 8 pieces. A single slice out of these 8 would be analogous to the numerator of a fraction. The collective 8 slices, representing the full pie, would correspond to the denominator. If someone consumed 3 slices, the pie's residual fraction would be


, as depicted in the adjacent image. It's vital to mention that a fraction's denominator should never be 0, as that would render the fraction indefinable. There are several operations applicable to fractions, a few of which are detailed below.


Adding and subtracting fractions is a tad more complex than doing so with whole numbers like 2 and 8. For these operations, fractions must have a shared denominator. One technique to determine a common denominator involves multiplying both the numerators and denominators of the fractions in question by the result of multiplying their individual denominators. By multiplying all denominators, you ensure that the resulting denominator will be a multiple of each of the original denominators. It's also crucial to multiply the numerators by the correct factors so that the fraction's overall value remains intact. This approach is one of the easiest to establish a common denominator. However, frequently, the results using this method won't be in their simplest form (though some tools can simplify them automatically). An example is provided below for clarity.


For any given set of fractions, apply this method: Multiply the numerator and denominator of each individual fraction by the product of the denominators from all the other fractions in the set, excluding its own denominator.


Another approach to identify a common denominator involves using the least common multiple (LCM) of the denominators. Once the LCM is found, you can then perform addition or subtraction on the numerators as you would with whole numbers. This LCM method tends to be more streamlined and often produces a fraction that's already simplified. For instance, if we consider denominators like 4, 6, and 2 from a previous example, the first shared multiple of these numbers would be their least common multiple.

  • The numbers that are multiples of 2 include: 2, 4, 6, 8, 10, and 12.
  • For the number 4, its multiples are: 4, 8, and 12.
  • And for the number 6, the multiples listed are: 6 and 12.

The smallest shared multiple among them is 12, making it the least common multiple. To solve an addition (or subtraction) involving fractions, adjust each fraction's numerator and denominator such that the denominator becomes 12. Once done, proceed to add the numerators.



Subtracting fractions follows a similar procedure as adding them. You need a shared denominator to carry out the subtraction. For a detailed understanding, check the addition guidelines and the provided examples below.



The process of multiplying fractions is quite direct. Unlike addition and subtraction, you don't need a common denominator. Instead, just multiply the numerators together and the denominators together to produce a new fraction. It's advisable to simplify the result if you can. Look at the examples below for a clearer understanding.



Dividing fractions is akin to multiplying them. To carry out division, multiply the top fraction by the inverse of the bottom fraction. The inverse of a number 'a' is just 1/a. When 'a' is a fraction, this basically means swapping the numerator and the denominator. For instance, the inverse of the fraction 3/4 is 4/3.

For a clearer picture, see the provided examples below.



Working with reduced fractions is typically more convenient. Hence, it's standard practice to present fractions in their simplest forms.


for instance, is more unwieldy than


The given calculator offers outputs in both improper fraction and mixed number formats. In both scenarios, fractions are displayed in their most simplified state by dividing the numerator and denominator by their highest shared factor.

Conversion between fractions and decimals:

Transitioning from decimals to fractions is quite direct. One must recognize that each position after the decimal point corresponds to an increasing power of 10: the first being 10^1, the second 10^2, the third 10^3, and so on. Identify to which power of 10 the decimal extends, use that as the denominator, place all numbers following the decimal as the numerator, and then simplify. For instance, for the number 0.1234, the digit 4 is in the 10^4 (or 10,000) position. Hence, the fraction becomes 1234/10000.

This reduces to 617/5000 since the largest shared factor for the numerator and denominator is 2. On the flip side, fractions whose denominators are either powers of 10 or can be converted to such, can be easily turned into decimals. Consider 1/2.

To express this as a decimal, first modify it to 5/10.

Given that the first decimal place signifies 10^-1, 5/10 becomes 0.5.

If it was 5/100, the result would be 0.05, and so forth. Beyond these examples, transforming fractions to decimals often involves using long division.

Frequent Fraction to Decimal Conversions in Engineering:

In the engineering domain, fractions frequently denote sizes, especially in reference to components like pipes and bolts.

How to do Fractions on a Calculator?

Using a calculator, convert fractions to decimals by dividing the numerator by the denominator. For advanced calculators, use the dedicated fraction key, often labeled 'a/b' or 'Frac'. Results may display as both fractions and decimals.

How to put a Fraction in a Calculator?

Enter the numerator, use the calculator's fraction function (often labeled 'a/b' or 'Frac'), and then input the denominator. This allows for fractional computations. Always refer to your calculator's manual for specific instructions.