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Adding and subtracting fractions
• Adding and subtracting fractions with the same denominator
You can add and subtract like fractions easily - simply add or subtract the numerators and write the sum over the common denominator.

• Adding and subtracting fractions with different denominator
Before you can add or subtract fractions with different denominators, you must first find equivalent fractions with the same denominator, like this:
1. Find the smallest multiple (LCM) of both numbers.
2. Rewrite the fractions as equivalent fractions with the LCM as the denominator.

Calculate:
 Solution (reduce the result): 