Answers

Subtract 6/21 from 7/42

7/42 - 6/21 is -5/42.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 21 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 21 × 2 = 42,
   6/21 = 6 × 2/21 × 2 = 12/42
4. Subtract the two like fractions:
   7/42 - 12/42 = 7 - 12/42 = -5/42

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