Answers

Subtract 4/21 from 63/20

1^st number: 3 3/20, 2^nd number: 4/21

63/20 - 4/21 is 1243/420.

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,
   63/20 = 63 × 21/20 × 21 = 1323/420
3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
   4/21 = 4 × 20/21 × 20 = 80/420
4. Subtract the two like fractions:
   1323/420 - 80/420 = 1323 - 80/420 = 1243/420
5. In mixed form: 2403/420

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