Subtract 81/28 from 12/8
1st number: 1 4/8, 2nd number: 2 25/28
12/8 - 81/28 is -39/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 28 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
12/8 = 12 × 7/8 × 7 = 84/56 - Likewise, for the 2nd fraction, since 28 × 2 = 56,
81/28 = 81 × 2/28 × 2 = 162/56 - Subtract the two like fractions:
84/56 - 162/56 = 84 - 162/56 = -78/56 - After reducing the fraction, the answer is -39/28
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