Subtract 20/18 from 28/54
1st number: 28/54, 2nd number: 1 2/18
28/54 - 20/18 is -16/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 18 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 54 × 1 = 54,
28/54 = 28 × 1/54 × 1 = 28/54 - Likewise, for the 2nd fraction, since 18 × 3 = 54,
20/18 = 20 × 3/18 × 3 = 60/54 - Subtract the two like fractions:
28/54 - 60/54 = 28 - 60/54 = -32/54 - After reducing the fraction, the answer is -16/27
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