Subtract 16/20 from 18/27
18/27 - 16/20 is -2/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 20 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 27 × 20 = 540,
18/27 = 18 × 20/27 × 20 = 360/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
16/20 = 16 × 27/20 × 27 = 432/540 - Subtract the two like fractions:
360/540 - 432/540 = 360 - 432/540 = -72/540 - After reducing the fraction, the answer is -2/15
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