Subtract 27/21 from 20/35
1st number: 20/35, 2nd number: 1 6/21
20/35 - 27/21 is -5/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 35 × 3 = 105,
20/35 = 20 × 3/35 × 3 = 60/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
27/21 = 27 × 5/21 × 5 = 135/105 - Subtract the two like fractions:
60/105 - 135/105 = 60 - 135/105 = -75/105 - After reducing the fraction, the answer is -5/7
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