Answers

Subtract 42/6 from 8/21

1^st number: 8/21, 2^nd number: 7 0/6

8/21 - 42/6 is -139/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 6 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 21 × 2 = 42,
   8/21 = 8 × 2/21 × 2 = 16/42
3. Likewise, for the 2nd fraction, since 6 × 7 = 42,
   42/6 = 42 × 7/6 × 7 = 294/42
4. Subtract the two like fractions:
   16/42 - 294/42 = 16 - 294/42 = -278/42
5. After reducing the fraction, the answer is -139/21

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