Subtract 20/27 from 28/72
28/72 - 20/27 is -19/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 27 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 72 × 3 = 216,
28/72 = 28 × 3/72 × 3 = 84/216 - Likewise, for the 2nd fraction, since 27 × 8 = 216,
20/27 = 20 × 8/27 × 8 = 160/216 - Subtract the two like fractions:
84/216 - 160/216 = 84 - 160/216 = -76/216 - After reducing the fraction, the answer is -19/54
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