Answers

Subtract 1/21 from 27/20

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

27/20 - 1/21 is 547/420.

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,
   1/21 = 1 × 20/21 × 20 = 20/420
4. Subtract the two like fractions:
   567/420 - 20/420 = 567 - 20/420 = 547/420
5. In mixed form: 1127/420

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