Subtract 18/27 from 9/20
9/20 - 18/27 is -13/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 27 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 20 × 27 = 540,
9/20 = 9 × 27/20 × 27 = 243/540 - Likewise, for the 2nd fraction, since 27 × 20 = 540,
18/27 = 18 × 20/27 × 20 = 360/540 - Subtract the two like fractions:
243/540 - 360/540 = 243 - 360/540 = -117/540 - After reducing the fraction, the answer is -13/60
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