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Fraction

Concept

Fraction

Fractions are a specific type of ratio comparing a part to a whole. They are written in the form ab,\frac{a}{b}, where the numerator aa is the part and the denominator bb is the whole.

partwhole=ab=numeratordenominator\begin{gathered} \dfrac{\text{part}}{\text{whole}}= \dfrac{a}{b}= \dfrac{\text{numerator}}{\text{denominator}} \end{gathered}

There are many possible ways to read fractions; you can try some combinations below, but when in doubt, one universal method is to say aa over b.b.
Fractions are also another way to write division of the numerator by the denominator. 18÷9189\begin{gathered} 18\div{9}\quad\Leftrightarrow\quad\dfrac{18}{9} \end{gathered} As such, a fraction like 189\frac{18}{9} can be simplified to 21\frac{2}{1} or just 2.2. Note: The denominator of a fraction can never be equal to 00, since the quotient of division by 00 is always undefined.
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