McGraw Hill Glencoe Geometry, 2012
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McGraw Hill Glencoe Geometry, 2012 View details
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Exercise 1 Page 913

To add or subtract fractions, they need to have the same denominator.

Practice makes perfect
When adding or subtracting fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators.
Since is a multiple of we can multiply both the numerator and denominator of by to create a common denominator.
Multiply
Now that we have a common denominator, we can proceed to simplifying the expression.