Subtract 21/35 from 7/20
7/20 - 21/35 is -1/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 35 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
7/20 = 7 × 7/20 × 7 = 49/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
21/35 = 21 × 4/35 × 4 = 84/140 - Subtract the two like fractions:
49/140 - 84/140 = 49 - 84/140 = -35/140 - After reducing the fraction, the answer is -1/4
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