Subtract 80/81 from 10/28
10/28 - 80/81 is -715/1134.
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,
10/28 = 10 × 81/28 × 81 = 810/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
80/81 = 80 × 28/81 × 28 = 2240/2268 - Subtract the two like fractions:
810/2268 - 2240/2268 = 810 - 2240/2268 = -1430/2268 - After reducing the fraction, the answer is -715/1134
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