Answers

Subtract 90/7 from 63/12

1^st number: 5 3/12, 2^nd number: 12 6/7

63/12 - 90/7 is -213/28.

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,
   63/12 = 63 × 7/12 × 7 = 441/84
3. Likewise, for the 2nd fraction, since 7 × 12 = 84,
   90/7 = 90 × 12/7 × 12 = 1080/84
4. Subtract the two like fractions:
   441/84 - 1080/84 = 441 - 1080/84 = -639/84
5. After reducing the fraction, the answer is -213/28

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