Answers

Subtract 21/7 from 7/42

1^st number: 7/42, 2^nd number: 3 0/7

7/42 - 21/7 is -17/6.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 7 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 42 × 1 = 42,
   7/42 = 7 × 1/42 × 1 = 7/42
3. Likewise, for the 2nd fraction, since 7 × 6 = 42,
   21/7 = 21 × 6/7 × 6 = 126/42
4. Subtract the two like fractions:
   7/42 - 126/42 = 7 - 126/42 = -119/42
5. After reducing the fraction, the answer is -17/6

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