Answers

Subtract 21/7 from 30/12

1^st number: 2 6/12, 2^nd number: 3 0/7

30/12 - 21/7 is -1/2.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 7 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 12 × 7 = 84,
   30/12 = 30 × 7/12 × 7 = 210/84
3. Likewise, for the 2nd fraction, since 7 × 12 = 84,
   21/7 = 21 × 12/7 × 12 = 252/84
4. Subtract the two like fractions:
   210/84 - 252/84 = 210 - 252/84 = -42/84
5. After reducing the fraction, the answer is -1/2

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