Answers

Subtract 21/10 from 24/81

1^st number: 24/81, 2^nd number: 2 1/10

24/81 - 21/10 is -487/270.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 10 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 81 × 10 = 810,
   24/81 = 24 × 10/81 × 10 = 240/810
3. Likewise, for the 2nd fraction, since 10 × 81 = 810,
   21/10 = 21 × 81/10 × 81 = 1701/810
4. Subtract the two like fractions:
   240/810 - 1701/810 = 240 - 1701/810 = -1461/810
5. After reducing the fraction, the answer is -487/270

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