Subtract 21/7 from 20/35
1st number: 20/35, 2nd number: 3 0/7
20/35 - 21/7 is -17/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 7 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 35 × 1 = 35,
20/35 = 20 × 1/35 × 1 = 20/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
21/7 = 21 × 5/7 × 5 = 105/35 - Subtract the two like fractions:
20/35 - 105/35 = 20 - 105/35 = -85/35 - After reducing the fraction, the answer is -17/7
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