Subtract 90/81 from 1/28
1st number: 1/28, 2nd number: 1 9/81
1/28 - 90/81 is -271/252.
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,
90/81 = 90 × 28/81 × 28 = 2520/2268 - Subtract the two like fractions:
81/2268 - 2520/2268 = 81 - 2520/2268 = -2439/2268 - After reducing the fraction, the answer is -271/252
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