Answers

Subtract 81/28 from 42/24

1^st number: 1 18/24, 2^nd number: 2 25/28

42/24 - 81/28 is -8/7.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 24 and 28 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 24 × 7 = 168,
   42/24 = 42 × 7/24 × 7 = 294/168
3. Likewise, for the 2nd fraction, since 28 × 6 = 168,
   81/28 = 81 × 6/28 × 6 = 486/168
4. Subtract the two like fractions:
   294/168 - 486/168 = 294 - 486/168 = -192/168
5. After reducing the fraction, the answer is -8/7

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