Subtract 20/27 from 21/35
21/35 - 20/27 is -19/135.
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,
20/27 = 20 × 35/27 × 35 = 700/945 - Subtract the two like fractions:
567/945 - 700/945 = 567 - 700/945 = -133/945 - After reducing the fraction, the answer is -19/135
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