Answers

Subtract 18/81 from 90/5

1^st number: 18 0/5, 2^nd number: 18/81

90/5 - 18/81 is 160/9.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 81 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 5 × 81 = 405,
   90/5 = 90 × 81/5 × 81 = 7290/405
3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
   18/81 = 18 × 5/81 × 5 = 90/405
4. Subtract the two like fractions:
   7290/405 - 90/405 = 7290 - 90/405 = 7200/405
5. After reducing the fraction, the answer is 160/9
6. In mixed form: 177/9

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