Answers

Subtract 72/21 from 80/9

1^st number: 8 8/9, 2^nd number: 3 9/21

80/9 - 72/21 is 344/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 21 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 9 × 7 = 63,
   80/9 = 80 × 7/9 × 7 = 560/63
3. Likewise, for the 2nd fraction, since 21 × 3 = 63,
   72/21 = 72 × 3/21 × 3 = 216/63
4. Subtract the two like fractions:
   560/63 - 216/63 = 560 - 216/63 = 344/63
5. In mixed form: 529/63

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