Answers

Subtract 9/7 from 21/5

1^st number: 4 1/5, 2^nd number: 1 2/7

21/5 - 9/7 is 102/35.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 7 is 35
   
   Next, find the equivalent fraction of both fractional numbers with denominator 35
2. For the 1st fraction, since 5 × 7 = 35,
   21/5 = 21 × 7/5 × 7 = 147/35
3. Likewise, for the 2nd fraction, since 7 × 5 = 35,
   9/7 = 9 × 5/7 × 5 = 45/35
4. Subtract the two like fractions:
   147/35 - 45/35 = 147 - 45/35 = 102/35
5. In mixed form: 232/35

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