Addition & Subtraction of Fractions
To add or subtract fractions whose denominators are the same, simply add or subtract the numerators and place the result over the denominator.
Examples:
To add or subtract fractions whose
denominators are not equal, it is necessary to transform one or both of
the fractions to make their denominators equal in order to add/subtract
as described above. It is possible to transform fractions by
multiplying or dividing both numerator and denominator by the same term.
Example: