Answers

Subtract 10/4 from 12/21

1^st number: 12/21, 2^nd number: 2 2/4

12/21 - 10/4 is -27/14.

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,
   12/21 = 12 × 4/21 × 4 = 48/84
3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
   10/4 = 10 × 21/4 × 21 = 210/84
4. Subtract the two like fractions:
   48/84 - 210/84 = 48 - 210/84 = -162/84
5. After reducing the fraction, the answer is -27/14

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