Answers

Subtract 81/56 from 42/70

1^st number: 42/70, 2^nd number: 1 25/56

42/70 - 81/56 is -237/280.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 56 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 70 × 4 = 280,
   42/70 = 42 × 4/70 × 4 = 168/280
3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
   81/56 = 81 × 5/56 × 5 = 405/280
4. Subtract the two like fractions:
   168/280 - 405/280 = 168 - 405/280 = -237/280

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