Subtract 28/15 from 9/20
1st number: 9/20, 2nd number: 1 13/15
9/20 - 28/15 is -17/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
9/20 = 9 × 3/20 × 3 = 27/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
28/15 = 28 × 4/15 × 4 = 112/60 - Subtract the two like fractions:
27/60 - 112/60 = 27 - 112/60 = -85/60 - After reducing the fraction, the answer is -17/12
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