Subtract 42/64 from 7/27
7/27 - 42/64 is -343/864.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 64 is 1728
Next, find the equivalent fraction of both fractional numbers with denominator 1728 - For the 1st fraction, since 27 × 64 = 1728,
7/27 = 7 × 64/27 × 64 = 448/1728 - Likewise, for the 2nd fraction, since 64 × 27 = 1728,
42/64 = 42 × 27/64 × 27 = 1134/1728 - Subtract the two like fractions:
448/1728 - 1134/1728 = 448 - 1134/1728 = -686/1728 - After reducing the fraction, the answer is -343/864
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