Answers

Subtract 28/63 from 21/7

1^st number: 3 0/7, 2^nd number: 28/63

21/7 - 28/63 is 23/9.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 63 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 7 × 9 = 63,
   21/7 = 21 × 9/7 × 9 = 189/63
3. Likewise, for the 2nd fraction, since 63 × 1 = 63,
   28/63 = 28 × 1/63 × 1 = 28/63
4. Subtract the two like fractions:
   189/63 - 28/63 = 189 - 28/63 = 161/63
5. After reducing the fraction, the answer is 23/9
6. In mixed form: 25/9

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