Answers

Subtract 5/21 from 63/28

1^st number: 2 7/28, 2^nd number: 5/21

63/28 - 5/21 is 169/84.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 21 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 28 × 3 = 84,
   63/28 = 63 × 3/28 × 3 = 189/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   5/21 = 5 × 4/21 × 4 = 20/84
4. Subtract the two like fractions:
   189/84 - 20/84 = 189 - 20/84 = 169/84
5. In mixed form: 21/84

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