Answers

Subtract 27/10 from 12/42

1^st number: 12/42, 2^nd number: 2 7/10

12/42 - 27/10 is -169/70.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 10 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 42 × 5 = 210,
   12/42 = 12 × 5/42 × 5 = 60/210
3. Likewise, for the 2nd fraction, since 10 × 21 = 210,
   27/10 = 27 × 21/10 × 21 = 567/210
4. Subtract the two like fractions:
   60/210 - 567/210 = 60 - 567/210 = -507/210
5. After reducing the fraction, the answer is -169/70

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