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A decimal can be written as a fraction using the place value table.
The number 0.2 can be put in this table to show the value of each figure

The figure 2 represents 2 tenths. This written as a fraction is
.
This can be simplified to
So 0.2 =
Now look at a number which has two figures after the decimal point as in 0.25

The figure 5 represents 5 hundredths. This written as a fraction is
0.25 =
+
=
+
= 
can be simplified to 
So 0.25 =
If a number has three figures after the decimal point, such as 0.125

The figure 5 represents 5 thousandths. This written as a fraction is
0.125 =
+
+ 
This is the same as
+
+
= 
can be simplified to 
So 0.125 =
Top tip!
Here's a quick method for changing decimals to fractions.
Look at the decimal and work out which number has the smallest value. For example in the decimal 0.75 the number 5 has the smallest value as
. Write the decimal over hundredths:
0.75 =
which can be simplified to 
Here's another example. With the decimal 0.375 the number 5 has the smallest value as
. Write the decimal over thousandths:
0.375 =
which can be simplified to 
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You can find Skillswise at http://www.bbc.co.uk/skillswise
This factsheet is BBC Copyright |