Answers

Subtract 49/21 from 42/18

1^st number: 2 6/18, 2^nd number: 2 7/21

42/18 - 49/21 is 0/1.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 21 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 18 × 7 = 126,
   42/18 = 42 × 7/18 × 7 = 294/126
3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
   49/21 = 49 × 6/21 × 6 = 294/126
4. Subtract the two like fractions:
   294/126 - 294/126 = 294 - 294/126 = 0/126
5. The answer is 0

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