Answers

Subtract 8/81 from 81/30

1^st number: 2 21/30, 2^nd number: 8/81

81/30 - 8/81 is 2107/810.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 81 is 810
2. For the 1st fraction, since 30 × 27 = 810,
   81/30 = 81 × 27/30 × 27 = 2187/810
3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
   8/81 = 8 × 10/81 × 10 = 80/810
4. Subtract the two fractions:
   2187/810 - 80/810 = 2187 - 80/810 = 2107/810
5. In mixed form: 2487/810

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