Subtract 45/27 from 20/28
1st number: 20/28, 2nd number: 1 18/27
20/28 - 45/27 is -20/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 27 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 27 × 28 = 756,
45/27 = 45 × 28/27 × 28 = 1260/756 - Subtract the two like fractions:
540/756 - 1260/756 = 540 - 1260/756 = -720/756 - After reducing the fraction, the answer is -20/21
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