Answers

Subtract 10/9 from 81/20

1^st number: 4 1/20, 2^nd number: 1 1/9

81/20 - 10/9 is 529/180.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 9 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   81/20 = 81 × 9/20 × 9 = 729/180
3. Likewise, for the 2nd fraction, since 9 × 20 = 180,
   10/9 = 10 × 20/9 × 20 = 200/180
4. Subtract the two like fractions:
   729/180 - 200/180 = 729 - 200/180 = 529/180
5. In mixed form: 2169/180

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