Answers

Subtract 81/7 from 20/9

1^st number: 2 2/9, 2^nd number: 11 4/7

20/9 - 81/7 is -589/63.

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,
   20/9 = 20 × 7/9 × 7 = 140/63
3. Likewise, for the 2nd fraction, since 7 × 9 = 63,
   81/7 = 81 × 9/7 × 9 = 729/63
4. Subtract the two like fractions:
   140/63 - 729/63 = 140 - 729/63 = -589/63

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