Subtract 64/12 from 27/21
1st number: 1 6/21, 2nd number: 5 4/12
27/21 - 64/12 is -85/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
27/21 = 27 × 4/21 × 4 = 108/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
64/12 = 64 × 7/12 × 7 = 448/84 - Subtract the two like fractions:
108/84 - 448/84 = 108 - 448/84 = -340/84 - After reducing the fraction, the answer is -85/21
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