Subtract 20/28 from 15/4
1st number: 3 3/4, 2nd number: 20/28
15/4 - 20/28 is 85/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 28 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
15/4 = 15 × 7/4 × 7 = 105/28 - Likewise, for the 2nd fraction, since 28 × 1 = 28,
20/28 = 20 × 1/28 × 1 = 20/28 - Subtract the two like fractions:
105/28 - 20/28 = 105 - 20/28 = 85/28 - In mixed form: 31/28
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