Proper and improper fractions. Mixed numbersA concise but great lesson about improper and proper fractions and mixed numbers. Improper fractions: Fractions with a numerator that is bigger than the denominator. For instance, the following fractions are improper.
Proper fraction: A fraction with a numerator that is smaller than the denominator. For instance, the following are all proper fractions.
Mixed number: A number written as the sum of a whole number and a proper fraction.
For instance, 2 +
1
3
is a mixed number.
The + sign is usually omitted so as to write 2
1
3
Mixed numbers can be converted to improper fractions and vice versa. In our example above,
To get
7
3
multiply 2 by 3 and then add 1. Keep the same denominator.
The above is a shortcut!
Using the shortcut however takes less time!
Notice that the denominator for 2 is 1 since 2 =
2
1
Converting to a mixed number You can also convert an improper fraction to a mixed number
Say you want to convert
13
5
to a mixed number
Ask yourself, " How many 5 can go into 13? " The answer is 2 2 is your whole number piece of the mixed number What is the remainder of this division? 5 × 2 = 10 and 13  10 = 3 3 is the numerator of the fraction piece The denominator remains the same, so it will be 5
The mixed number is 2
3
5
Another example will make this crystal clear may be
Convert
25
6
to a mixed number
Ask yourself, " How many 6 can go into 25? " The answer is 4 4 is your whole number piece of the mixed number What is the remainder of this division? 6 × 4 = 24 and 25  24 = 1 1 is the numerator of the fraction piece The denominator remains the same, so it will be 6
The mixed number is 4
1
6
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