Online fraction calculator to calculate fractions. Add, subtract, multiply or divide. With percentages and decimal values. Lots of tips!

**You are watching : ** what is a third of eighteen

fractions is your boss? With our fraction calculator you can easily **add, subtract, multiply or divide fractions**. You can also use our Fraction Converter to easily **convert fractions into decimals or percentages.** But it’s best if you learn **how fractions work** yourself. We have put together a lot of calculation tips for you here.

Online fraction calculator

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With this calculator you can easily add, subtract, multiply and divide fractions (addition, subtraction, Multiplication and division of fractions).

Calculator: Fractions convert to decimal and percentage

Did you know that you can convert any fraction to a decimal (i.e. a number with a comma). ? The easiest way to do this is with the calculator below or a pocket calculator: You just have to divide the numerator by the denominator and you have the correct result: 3/4 is, for example, 3 divided by 4 and therefore equal to 0.75 – which, by the way, is the same as is 75%.

With this app you can easily convert fractions to decimals or percentages.

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Table: fraction, decimal and percent

You can also simply look up the most common fractions in our fraction and percentage table here:

Written out FractionIn percent, roundedDecimal11/1100%1One half1/250%0.5One third1 /333.3% (period) 0.333 (period) a quarter 1/425% 0.25 a fifth 1/520% 0.2 a sixth 1/616.67% 0.166 (period) a seventh 1/714 .29%0.1429One eighth 1/812.5%0.125One ninth 1/911.11% (period)0.11 (period)One tenth 1/1010%0.1One twentieth 1/205%0.05One twentieth 1/254%0.025one Fiftieth1/502%0.02One hundredth1/1001%0.01One thousandth (1 per mil)1/10000.1%0.001

What are fractions?

**Fractions are simply parts of a whole.** Written looks one Always break like this:

\text{break}=\frac{\text {numerator}}{\text{denominator}}

This is actually nothing more than the somewhat more complicated representation or notation of number 1 (numerator) divided by number 2 (denominator).

In mathematics, fractions are used to calculate parts of a whole. But even in life, fractions are used to describe parts of a whole. For example, you say half (1/2) or a quarter (1/4) hour. You’ve probably used fractions before.

**But let’s take a look at what fractions mean exactly. For this we take the quarter: **

If you divide a round cake into 4 equal parts, then each of these partial cake pieces is then 1/4 (a quarter) of the cake (the whole ). If you put all 4 parts back together, then you have 1/4 + 1/4 + 1/4 +1/4 = 4/4 cake, so again a whole one.

In this logic you can now also perform difficult fraction calculations. For example, dividing the cake by 16. Then each piece is 1/16 (one sixteenth) in size. And if someone eats 3 such pieces, then they have eaten 1/16 + 1/16 + 1/16 = 3/16 cakes.

It gets a bit more complicated when you want to bring together fractions with different denominators – for example add. The question of how much cake someone ate in total who first ate 1/16 and then 1/4 is no longer that easy at first glance. Unless you know the following rules. 🙂

Calculation: How do you add fractions?

**If the denominators are the same, we can just add the numerators (fractions plus do the math).**

\frac{\text{1}}{\text{4}}+\frac{ \text{2}}{\text{4}}=\frac{\text{3}}{\text{4}}

**If the denominators are different, ** we first have to align them (i.e. find the common denominator) and then we can add.

\frac{\text{1}}{\text{4}}+\frac{\text{1}}{\text{16}}=\frac{\text{4}} {\text{16}}+\frac{\text{1}}{\text{16}}=\frac{\text{5}}{\text{16}}

< p>**Understood everything? Otherwise watch this video about adding fractions again:**

Calculation method: How do you subtract fractions?

**If the denominators are the same are, we can simply subtract the numerators (calculate fractions minus).**

\frac{\text{2}}{\text{4}}-\frac{\text{1}}{\text{4}}=\frac{\text{1}}{\text{4 }}

**If the denominators are different**, we must first match them (i.e. find the common denominator) and then we can subtract.

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\frac{\text{1}}{\text{4}}-\frac{\ text{1}}{\text{16}}=\frac{\text{4}}{\text{16}}-\frac{\text{1}}{\text{16}}=\frac{ \text{3}}{\text{16}}

**Are you okay? If not, watch this video about subtracting fractions again:**

Calculation method: How do you multiply fractions?

Taking fractions is very easy : **Whether the denominators are the same or different, all you have to do is multiply the denominator by the other denominator and the numerator by the other numerator:**

\frac{\text{2}}{\text{4}}\times\frac{\text{1}}{\ text{2}}=\frac{\text{2}}{\text{8}}

**It’s actually quite easy, isn’t it? If not, just watch this video about multiplying fractions again:**

Calculation method: How do you divide fractions?

**Divide fractions is also easy if you know the right trick:**

You just have to “flip” the SECOND of the two fractions (i.e. denominator up and numerator down) and a “time” instead of a ” divided” between the two fractions. After that you can simply multiply the denominator with the other denominator and the numerator with the other numerator:

\frac{\text{3}}{\text{8}}:\frac{\text{1}}{\text{4}}=\frac{\text{3}}{\text{ 8}}\times\frac{\text{4}}{\text{1}}=\frac{\text{12}}{\text{8}}

< strong>Got it? If not, no problem: watch this video about dividing fractions again:

FAQ

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How do you calculate the fraction?

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Converting a fraction to a decimal is as easy as dividing the numerator by the denominator. To the calculator

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How do I divide by a fraction?

If a fraction is to be divided (divided) by another, this is done by dividing the multiplies the first fraction by the reciprocal of the other. The reciprocal is formed by swapping the numerator and denominator of the fraction. Here is the calculation again.

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How do you convert a decimal to a fraction?

To convert a finite decimal (point) number, such as 1.572, to a fraction only a few steps are required: First of all, the respective decimal number is written without a comma, which would correspond to 1572 in our example. Next, write a 1 in the denominator of the fraction and after the 1 in the denominator then as many zeros as there are places after the decimal point of the respective number, which would then be three zeros in the example.

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How do you convert a decimal to hours?

The conversion of decimal numbers into hours and minutes (and vice versa) is primarily used in industry and is usually used for time recording. Our decimal time converter will help you convert to industrial time.

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How do you get from a fraction to a decimal?

There are ways to convert a fraction to a decimal basically two possibilities: On the one hand you can create a power of ten by reducing or expanding fractions. This means that you can reach a power of ten if you divide or multiply the numerator and denominator by the same number.

Otherwise, the denominator of the fraction already contains a 10, 100, 1000, etc. or you can alternatively use Shortening or expanding the fraction can easily create a 10, 100, 1000 etc. in the denominator.

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