Answers

Subtract 15/81 from 98/20

1^st number: 4 18/20, 2^nd number: 15/81

98/20 - 15/81 is 1273/270.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 81 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 20 × 81 = 1620,
   98/20 = 98 × 81/20 × 81 = 7938/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   15/81 = 15 × 20/81 × 20 = 300/1620
4. Subtract the two like fractions:
   7938/1620 - 300/1620 = 7938 - 300/1620 = 7638/1620
5. After reducing the fraction, the answer is 1273/270
6. In mixed form: 4193/270

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