To subtract fractions, the denominators (bottom numbers) must be equal; so first convert the fractions into equivalent fractions with the same denominator. Then the numerators (top numbers) are subtracted and the resulting fraction simplified:
5/12 - 1/6 = 5/12 - 1x2/6x2
= 5/12 - 2/12
= 5-2/12
= 3/12
= 1x3/4x3
= 1/4
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