# Fraction Calculator

Below are multiple fraction calculators capable of addition, subtraction, multiplication, division, simplification, and conversion between fractions and decimals. Fields above the solid black line represent the numerator, while fields below represent the denominator. Enter appropriate values, ideally integers, into each field, select the desired operation, and click the "Calculate" button to calculate. The "Simplify Fractions Calculator" accepts mixed number inputs, and the "Decimal to Fraction Calculator" receives decimal inputs. Further details about each operation and calculator are provided at the bottom of the page.

 + - x / = ? ?

 69 5
=
 69 5
= 13
 4 5
 = ?

 = ? ?

## Fraction to Decimal Calculator

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In mathematics, a fraction is a number that represents a part of a whole. It consists of a numerator and a denominator. The numerator represents the number of equal parts of a whole, while the denominator is the total number of parts that make up said whole. For example, in the fraction
 3 5
, the numerator is 3, and the denominator is 5. A more illustrative example could involve a pie with 8 slices. 1 of those 8 slices would constitute the numerator of a fraction, while the total of 8 slices that comprises the whole pie would be the denominator. If a person were to eat 3 slices, the remaining fraction of the pie would therefore be
 5 8
as shown in the image to the right. Note that the denominator of a fraction cannot be 0, as it would make the fraction undefined. Fractions can undergo many different operations, some of which are mentioned below.

Unlike adding and subtracting integers such as 2 and 8, fractions require a common denominator to undergo these operations. The equations provided below account for this by multiplying the numerators and denominators of all of the fractions involved in the addition by the denominators of each fraction (excluding multiplying itself by its own denominator). Multiplying all of the denominators ensures that the new denominator is certain to be a multiple of each individual denominator. Multiplying the numerator of each fraction by the same factors is necessary, since fractions are ratios of values and a changed denominator requires that the numerator be changed by the same factor in order for the value of the fraction to remain the same. This is arguably the simplest way to ensure that the fractions have a common denominator. Note that in most cases, the solutions to these equations will not appear in simplified form (though the provided calculator computes the simplification automatically). An alternative to using this equation in cases where the fractions are uncomplicated would be to find a least common multiple and then add or subtract the numerators as one would an integer. Depending on the complexity of the fractions, finding the least common multiple for the denominator can be more efficient than using the equations. Refer to the equations below for clarification.

 a b
+
 c d
= (
 a b
×
 d d
) + (
 c d
×
 b b
) =
EX:
 3 4
+
 1 6
=
 18 24
+
 4 24
=
 22 24
=
 11 12

### Subtraction:

Fraction subtraction is essentially the same as fraction addition. A common denominator is required for the operation to occur. Refer to the addition section as well as the equations below for clarification.

 a b
 c d
= (
 a b
×
 d d
) – (
 c d
×
 b b
) =
EX:
 3 4
 1 6
=
 18 24
 4 24
=
 14 24
=
 7 12

### Multiplication:

Multiplying fractions is fairly straightforward. Unlike adding and subtracting, it is not necessary to compute a common denominator in order to multiply fractions. Simply, the numerators and denominators of each fraction are multiplied, and the result forms a new numerator and denominator. If possible, the solution should be simplified. Refer to the equations below for clarification.

 a b
×
 c d
=
 ac bd
EX:
 3 4
×
 1 6
=
 3 24
=
 1 8

### Division:

The process for dividing fractions is similar to that for multiplying fractions. In order to divide fractions, the fraction in the numerator is multiplied by the reciprocal of the fraction in the denominator. The reciprocal of a number a is simply
 1 a
. When a is a fraction, this essentially involves exchanging the position of the numerator and the denominator. The reciprocal of the fraction
 3 4
would therefore be
 4 3
. Refer to the equations below for clarification.

 a b
/
 c d
=
 a b
×
 d c
=
EX:
 3 4
/
 1 6
=
 3 4
×
 6 1
=
 18 4
=
 9 2

### Simplification:

It is often easier to work with simplified fractions. As such, fraction solutions are commonly expressed in their simplified forms.
 220 440
for example, is more cumbersome than
 1 2
. The calculator provided returns fraction inputs in both improper fraction form, as well as mixed number form. In both cases, fractions are presented in their lowest forms by dividing both numerator and denominator by their greatest common factor.

### Converting between fractions and decimals:

Converting from decimals to fractions is straightforward. It does however require the understanding that each decimal place to the right of the decimal point represents a power of 10; the first decimal place being 101, the second 102, the third 103, and so on. Simply determine what power of 10 the decimal extends to, use that power of 10 as the denominator, enter each number to the right of the decimal point as the numerator, and simplify. For example, looking at the number 0.1234, the number 4 is in the fourth decimal place which constitutes 104, or 10,000. This would make the fraction
 1234 10000
, which simplifies to
 617 5000
, since the greatest common factor between the numerator and denominator is 2.

Similarly, fractions with denominators that are powers of 10 (or can be converted to powers of 10) can be translated to decimal form using the same principles. Take the fraction
 1 2
for example. To convert this fraction into a decimal, first convert it into the fraction
 5 10
. Knowing that the first decimal place represents 101,
 5 10
can be converted to 0.5. If the fraction were instead
 5 100
, the decimal would then be 0.05, and so on. Beyond this, converting fractions into decimals requires the operation of long division.

### Common Engineering Fraction to Decimal Conversions

In engineering, fractions are widely used to describe the size of components such as pipes and bolts. The most common fractional and decimal equivalents are listed below.

 64th 32nd 16th 8th 4th 2nd Decimal Decimal(inch to mm) 1/64 0.015625 0.396875 2/64 1/32 0.03125 0.79375 3/64 0.046875 1.190625 4/64 2/32 1/16 0.0625 1.5875 5/64 0.078125 1.984375 6/64 3/32 0.09375 2.38125 7/64 0.109375 2.778125 8/64 4/32 2/16 1/8 0.125 3.175 9/64 0.140625 3.571875 10/64 5/32 0.15625 3.96875 11/64 0.171875 4.365625 12/64 6/32 3/16 0.1875 4.7625 13/64 0.203125 5.159375 14/64 7/32 0.21875 5.55625 15/64 0.234375 5.953125 16/64 8/32 4/16 2/8 1/4 0.25 6.35 17/64 0.265625 6.746875 18/64 9/32 0.28125 7.14375 19/64 0.296875 7.540625 20/64 10/32 5/16 0.3125 7.9375 21/64 0.328125 8.334375 22/64 11/32 0.34375 8.73125 23/64 0.359375 9.128125 24/64 12/32 6/16 3/8 0.375 9.525 25/64 0.390625 9.921875 26/64 13/32 0.40625 10.31875 27/64 0.421875 10.715625 28/64 14/32 7/16 0.4375 11.1125 29/64 0.453125 11.509375 30/64 15/32 0.46875 11.90625 31/64 0.484375 12.303125 32/64 16/32 8/16 4/8 2/4 1/2 0.5 12.7 33/64 0.515625 13.096875 34/64 17/32 0.53125 13.49375 35/64 0.546875 13.890625 36/64 18/32 9/16 0.5625 14.2875 37/64 0.578125 14.684375 38/64 19/32 0.59375 15.08125 39/64 0.609375 15.478125 40/64 20/32 10/16 5/8 0.625 15.875 41/64 0.640625 16.271875 42/64 21/32 0.65625 16.66875 43/64 0.671875 17.065625 44/64 22/32 11/16 0.6875 17.4625 45/64 0.703125 17.859375 46/64 23/32 0.71875 18.25625 47/64 0.734375 18.653125 48/64 24/32 12/16 6/8 3/4 0.75 19.05 49/64 0.765625 19.446875 50/64 25/32 0.78125 19.84375 51/64 0.796875 20.240625 52/64 26/32 13/16 0.8125 20.6375 53/64 0.828125 21.034375 54/64 27/32 0.84375 21.43125 55/64 0.859375 21.828125 56/64 28/32 14/16 7/8 0.875 22.225 57/64 0.890625 22.621875 58/64 29/32 0.90625 23.01875 59/64 0.921875 23.415625 60/64 30/32 15/16 0.9375 23.8125 61/64 0.953125 24.209375 62/64 31/32 0.96875 24.60625 63/64 0.984375 25.003125 64/64 32/32 16/16 8/8 4/4 2/2 1 25.4