Answers

Subtract 8/15 from 81/42

1^st number: 1 39/42, 2^nd number: 8/15

81/42 - 8/15 is 293/210.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 15 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 42 × 5 = 210,
   81/42 = 81 × 5/42 × 5 = 405/210
3. Likewise, for the 2nd fraction, since 15 × 14 = 210,
   8/15 = 8 × 14/15 × 14 = 112/210
4. Subtract the two like fractions:
   405/210 - 112/210 = 405 - 112/210 = 293/210
5. In mixed form: 183/210

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