Answers

Subtract 81/56 from 42/40

1^st number: 1 2/40, 2^nd number: 1 25/56

42/40 - 81/56 is -111/280.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 56 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 40 × 7 = 280,
   42/40 = 42 × 7/40 × 7 = 294/280
3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
   81/56 = 81 × 5/56 × 5 = 405/280
4. Subtract the two like fractions:
   294/280 - 405/280 = 294 - 405/280 = -111/280

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