Subtract 3/81 from 1/28
1/28 - 3/81 is -1/756.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 81 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 28 × 81 = 2268,
1/28 = 1 × 81/28 × 81 = 81/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
3/81 = 3 × 28/81 × 28 = 84/2268 - Subtract the two like fractions:
81/2268 - 84/2268 = 81 - 84/2268 = -3/2268 - After reducing the fraction, the answer is -1/756
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