Answers

Subtract 27/4 from 4/21

1^st number: 4/21, 2^nd number: 6 3/4

4/21 - 27/4 is -551/84.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 4 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   4/21 = 4 × 4/21 × 4 = 16/84
3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
   27/4 = 27 × 21/4 × 21 = 567/84
4. Subtract the two like fractions:
   16/84 - 567/84 = 16 - 567/84 = -551/84

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