Answers

Subtract 1/21 from 81/56

1^st number: 1 25/56, 2^nd number: 1/21

81/56 - 1/21 is 235/168.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 21 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 56 × 3 = 168,
   81/56 = 81 × 3/56 × 3 = 243/168
3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
   1/21 = 1 × 8/21 × 8 = 8/168
4. Subtract the two like fractions:
   243/168 - 8/168 = 243 - 8/168 = 235/168
5. In mixed form: 167/168

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