Answers

Subtract 10/81 from 90/7

1^st number: 12 6/7, 2^nd number: 10/81

90/7 - 10/81 is 7220/567.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 81 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 7 × 81 = 567,
   90/7 = 90 × 81/7 × 81 = 7290/567
3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
   10/81 = 10 × 7/81 × 7 = 70/567
4. Subtract the two like fractions:
   7290/567 - 70/567 = 7290 - 70/567 = 7220/567
5. In mixed form: 12416/567

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