Subtract 18/35 from 21/27
21/27 - 18/35 is 83/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 35 is 945
Next, find the equivalent fraction of both fractional numbers with denominator 945 - For the 1st fraction, since 27 × 35 = 945,
21/27 = 21 × 35/27 × 35 = 735/945 - Likewise, for the 2nd fraction, since 35 × 27 = 945,
18/35 = 18 × 27/35 × 27 = 486/945 - Subtract the two like fractions:
735/945 - 486/945 = 735 - 486/945 = 249/945 - After reducing the fraction, the answer is 83/315
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