Answers

Subtract 42/56 from 81/5

1^st number: 16 1/5, 2^nd number: 42/56

81/5 - 42/56 is 309/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 56 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 5 × 56 = 280,
   81/5 = 81 × 56/5 × 56 = 4536/280
3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
   42/56 = 42 × 5/56 × 5 = 210/280
4. Subtract the two like fractions:
   4536/280 - 210/280 = 4536 - 210/280 = 4326/280
5. After reducing the fraction, the answer is 309/20
6. In mixed form: 159/20

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