Subtract 20/15 from 3/28
1st number: 3/28, 2nd number: 1 5/15
3/28 - 20/15 is -103/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
3/28 = 3 × 15/28 × 15 = 45/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
20/15 = 20 × 28/15 × 28 = 560/420 - Subtract the two like fractions:
45/420 - 560/420 = 45 - 560/420 = -515/420 - After reducing the fraction, the answer is -103/84
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