Subtract 70/21 from 20/14
1st number: 1 6/14, 2nd number: 3 7/21
20/14 - 70/21 is -40/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
20/14 = 20 × 3/14 × 3 = 60/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
70/21 = 70 × 2/21 × 2 = 140/42 - Subtract the two like fractions:
60/42 - 140/42 = 60 - 140/42 = -80/42 - After reducing the fraction, the answer is -40/21
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