How do you add fractions with different denominators?

Find the least common denominator (LCD), rewrite each fraction over the LCD, add the numerators, then simplify. For example, 1/2 + 1/3 uses an LCD of 6: 3/6 + 2/6 = 5/6.

How do you divide fractions?

Multiply the first fraction by the reciprocal of the second — flip the second fraction and multiply. For example, 1/2 ÷ 1/4 = 1/2 × 4/1 = 4/2 = 2.

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