Answers

Subtract 10/21 from 27/20

1^st number: 1 7/20, 2^nd number: 10/21

27/20 - 10/21 is 367/420.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 21 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   27/20 = 27 × 21/20 × 21 = 567/420
3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
   10/21 = 10 × 20/21 × 20 = 200/420
4. Subtract the two like fractions:
   567/420 - 200/420 = 567 - 200/420 = 367/420

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