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Fractions Overview

Simply put, a rational number is a fraction. A rational number is one which can be made by dividing one number by another non-zero number.

The number on the top is the numerator, the number on the bottom is the denominator.

To make any number into a fraction, add a denominator of 1. It could be argued that the simplest fraction is 11.

1

 = 

11

13

 = 

131

421

 = 

42

14,128
1

 = 

14,128

Fractions can be written with a sloping line or a horizontal line. Which is used might depend on how tidy it looks, or what you are doing with it. They have exactly the same meaning.

 1 
 2 

 = 

12

1,2345,678

 = 

1,234
5,678
  • The sloping line used to write a fraction is technically known as a solidus. It's sometimes called a fraction slash. It's slightly more leaning over than a normal forward slash used in ordinary writing: ⁄ vs /.
  • The horizontal line used to write a fraction is technically known as a vinculum.