Subtract 28/72 from 20/54
20/54 - 28/72 is -1/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 72 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 54 × 4 = 216,
20/54 = 20 × 4/54 × 4 = 80/216 - Likewise, for the 2nd fraction, since 72 × 3 = 216,
28/72 = 28 × 3/72 × 3 = 84/216 - Subtract the two like fractions:
80/216 - 84/216 = 80 - 84/216 = -4/216 - After reducing the fraction, the answer is -1/54
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