Subtract 75/81 from 7/28
7/28 - 75/81 is -73/108.
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,
7/28 = 7 × 81/28 × 81 = 567/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
75/81 = 75 × 28/81 × 28 = 2100/2268 - Subtract the two like fractions:
567/2268 - 2100/2268 = 567 - 2100/2268 = -1533/2268 - After reducing the fraction, the answer is -73/108
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