Answers

Subtract 9/49 from 28/21

1^st number: 1 7/21, 2^nd number: 9/49

28/21 - 9/49 is 169/147.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 49 is 147
   
   Next, find the equivalent fraction of both fractional numbers with denominator 147
2. For the 1st fraction, since 21 × 7 = 147,
   28/21 = 28 × 7/21 × 7 = 196/147
3. Likewise, for the 2nd fraction, since 49 × 3 = 147,
   9/49 = 9 × 3/49 × 3 = 27/147
4. Subtract the two like fractions:
   196/147 - 27/147 = 196 - 27/147 = 169/147
5. In mixed form: 122/147

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