Subtract 28/20 from 72/54
1st number: 1 18/54, 2nd number: 1 8/20
72/54 - 28/20 is -1/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 20 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 54 × 10 = 540,
72/54 = 72 × 10/54 × 10 = 720/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
28/20 = 28 × 27/20 × 27 = 756/540 - Subtract the two like fractions:
720/540 - 756/540 = 720 - 756/540 = -36/540 - After reducing the fraction, the answer is -1/15
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