Answers

Subtract 80/7 from 21/14

1^st number: 1 7/14, 2^nd number: 11 3/7

21/14 - 80/7 is -139/14.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 14 and 7 is 14
   
   Next, find the equivalent fraction of both fractional numbers with denominator 14
2. For the 1st fraction, since 14 × 1 = 14,
   21/14 = 21 × 1/14 × 1 = 21/14
3. Likewise, for the 2nd fraction, since 7 × 2 = 14,
   80/7 = 80 × 2/7 × 2 = 160/14
4. Subtract the two like fractions:
   21/14 - 160/14 = 21 - 160/14 = -139/14

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