Subtract 40/54 from 20/28
20/28 - 40/54 is -5/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 54 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 28 × 27 = 756,
20/28 = 20 × 27/28 × 27 = 540/756 - Likewise, for the 2nd fraction, since 54 × 14 = 756,
40/54 = 40 × 14/54 × 14 = 560/756 - Subtract the two like fractions:
540/756 - 560/756 = 540 - 560/756 = -20/756 - After reducing the fraction, the answer is -5/189
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