When adding or subtracting fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators.
7/9 + 2/6
Now, we can factor both of the denominators to find any common factors.
9= 3( 3) and
6= 2( 3)
The only common factor is 3.
Therefore, the common denominator is equal to 2( 3)( 3) or 18.
Now, we can multiply both numerator and denominator of each fraction by the factors that do not occur in their denominators.
