Answers

Subtract 7/20 from 63/21

1^st number: 3 0/21, 2^nd number: 7/20

63/21 - 7/20 is 53/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 21 × 20 = 420,
   63/21 = 63 × 20/21 × 20 = 1260/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   7/20 = 7 × 21/20 × 21 = 147/420
4. Subtract the two like fractions:
   1260/420 - 147/420 = 1260 - 147/420 = 1113/420
5. After reducing the fraction, the answer is 53/20
6. In mixed form: 213/20

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