Answers

Subtract 30/81 from 98/80

1^st number: 1 18/80, 2^nd number: 30/81

98/80 - 30/81 is 923/1080.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 81 is 6480
   
   Next, find the equivalent fraction of both fractional numbers with denominator 6480
2. For the 1st fraction, since 80 × 81 = 6480,
   98/80 = 98 × 81/80 × 81 = 7938/6480
3. Likewise, for the 2nd fraction, since 81 × 80 = 6480,
   30/81 = 30 × 80/81 × 80 = 2400/6480
4. Subtract the two like fractions:
   7938/6480 - 2400/6480 = 7938 - 2400/6480 = 5538/6480
5. After reducing the fraction, the answer is 923/1080

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