Answers

Subtract 21/56 from 81/30

1^st number: 2 21/30, 2^nd number: 21/56

81/30 - 21/56 is 93/40.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 56 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 30 × 28 = 840,
   81/30 = 81 × 28/30 × 28 = 2268/840
3. Likewise, for the 2nd fraction, since 56 × 15 = 840,
   21/56 = 21 × 15/56 × 15 = 315/840
4. Subtract the two like fractions:
   2268/840 - 315/840 = 2268 - 315/840 = 1953/840
5. After reducing the fraction, the answer is 93/40
6. In mixed form: 213/40

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