Subtract 18/27 from 21/35
21/35 - 18/27 is -1/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 27 is 945
Next, find the equivalent fraction of both fractional numbers with denominator 945 - For the 1st fraction, since 35 × 27 = 945,
21/35 = 21 × 27/35 × 27 = 567/945 - Likewise, for the 2nd fraction, since 27 × 35 = 945,
18/27 = 18 × 35/27 × 35 = 630/945 - Subtract the two like fractions:
567/945 - 630/945 = 567 - 630/945 = -63/945 - After reducing the fraction, the answer is -1/15
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