Answers

Subtract 80/7 from 80/9

1^st number: 8 8/9, 2^nd number: 11 3/7

80/9 - 80/7 is -160/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 7 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 7 × 9 = 63,
   80/7 = 80 × 9/7 × 9 = 720/63
4. Subtract the two like fractions:
   560/63 - 720/63 = 560 - 720/63 = -160/63

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