Subtract 40/81 from 12/28
12/28 - 40/81 is -37/567.
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,
12/28 = 12 × 81/28 × 81 = 972/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
40/81 = 40 × 28/81 × 28 = 1120/2268 - Subtract the two like fractions:
972/2268 - 1120/2268 = 972 - 1120/2268 = -148/2268 - After reducing the fraction, the answer is -37/567
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