Subtract 7/28 from 10/81
10/81 - 7/28 is -41/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 28 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 81 × 28 = 2268,
10/81 = 10 × 28/81 × 28 = 280/2268 - Likewise, for the 2nd fraction, since 28 × 81 = 2268,
7/28 = 7 × 81/28 × 81 = 567/2268 - Subtract the two like fractions:
280/2268 - 567/2268 = 280 - 567/2268 = -287/2268 - After reducing the fraction, the answer is -41/324
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