Answers

Subtract 21/56 from 21/20

1^st number: 1 1/20, 2^nd number: 21/56

21/20 - 21/56 is 27/40.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 56 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 20 × 14 = 280,
   21/20 = 21 × 14/20 × 14 = 294/280
3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
   21/56 = 21 × 5/56 × 5 = 105/280
4. Subtract the two like fractions:
   294/280 - 105/280 = 294 - 105/280 = 189/280
5. After reducing the fraction, the answer is 27/40

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