WEBVTT

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Here is the problem: 1 over 8 minus 5 over 12.

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Exact arithmetic with fractions (results kept in lowest terms).

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Rewrite both fractions with the least common denominator. The LCD of 8 and 12 is 24.

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Subtract the numerators and keep the denominator.

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Final answer in lowest terms.

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So the answer is negative 7 over 24.

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Fractions are combined over a common denominator for addition and subtraction, multiplied straight across, and divided by multiplying by the reciprocal. The result is reduced by the greatest common factor.

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Decimal check: negative 7 over 24 approximately negative 0.2916666667.