Subtract 20/28 from 8/27
8/27 - 20/28 is -79/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 28 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 27 × 28 = 756,
8/27 = 8 × 28/27 × 28 = 224/756 - Likewise, for the 2nd fraction, since 28 × 27 = 756,
20/28 = 20 × 27/28 × 27 = 540/756 - Subtract the two like fractions:
224/756 - 540/756 = 224 - 540/756 = -316/756 - After reducing the fraction, the answer is -79/189
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