Fractions- lesson 1



Fraction: A numerical quantity that is not a whole number (e.g. \(\frac{1}{2}\), 0.5), a proportion of something. A fraction simply tells us how many parts of a whole we have.

• The numerator says how many parts we have. 
• The denominator says how many equal parts the whole is divided into.

The number of colored boxes in the table are 5 and total number of boxes of equal size, are 16,
therefore the fractional form of colored boxes is 5 out of 16 i.e. \(\frac{5}{16}\)

Another example: suppose Adam had 7 candies and he ate 3 of them then the fractional form of candies that he ate is: \(\frac{3}{7}\) i.e. he ate 3 candies out of 7.
 
Types of fractions: there are three types of fractions:
(1) Proper fractions (2) Improper fractions (3) Mixed fractions

1) Proper fraction: A fraction having numerator smaller than the denominator is called proper fraction (Denominator>Numerator)
Example: \(\frac{2}{7}\), \(\frac{8}{11}\), \(\frac{3}{7}\), \(\frac{5}{8}\), \(\frac{13}{17}\) etc.

2) Improper fraction: A fraction having numerator greater than the denominator, is called improper fraction (Numerator>Denominator)
Example: \(\frac{7}{2}\), \(\frac{11}{8}\), \(\frac{7}{3}\), \(\frac{8}{5}\), \(\frac{19}{13}\) etc.

3) Mixed fraction: A combination of a proper fraction and a whole number is called a mixed fraction.
Example: \(2\frac{2}{7}\),\(5\frac{8}{11}\), \(4\frac{3}{7}\), \(7\frac{5}{8}\), \(11\frac{13}{19}\) etc.



Conversion of Fractions:
1) Mixed Fraction into Improper Fraction: A mixed fraction may always be converted into an improper fraction.

Rule to convert: Follow the 3-step rule given below:

Step 1: Multiply the Whole number part by the denominator 

Step 2: then add to the numerator to the product found in Step 1 

Step 3: This new sum will be your numerator over the denominator.

\(W\frac{N}{D}\) = \(\frac{W\times{D}+N}{D}\)


2) Improper Fraction into Mixed FractionAn improper fraction can always be converted into a mixed fraction. 

Rule to convert
Step 1: Divide the numerator by the denominator to get the quotient and remainder. 

Step 2: Then the quotient is the Whole number part and the remainder will be the Numerator over the denominator. 

Example: \(\frac{37}{7}\) can be converted into mixed fraction as follows:



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