Subtract 21/6 from 7/20
1st number: 7/20, 2nd number: 3 3/6
7/20 - 21/6 is -63/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 6 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
7/20 = 7 × 3/20 × 3 = 21/60 - Likewise, for the 2nd fraction, since 6 × 10 = 60,
21/6 = 21 × 10/6 × 10 = 210/60 - Subtract the two like fractions:
21/60 - 210/60 = 21 - 210/60 = -189/60 - After reducing the fraction, the answer is -63/20
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