Answers

Subtract 15/81 from 98/40

1^st number: 2 18/40, 2^nd number: 15/81

98/40 - 15/81 is 1223/540.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 81 is 3240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3240
2. For the 1st fraction, since 40 × 81 = 3240,
   98/40 = 98 × 81/40 × 81 = 7938/3240
3. Likewise, for the 2nd fraction, since 81 × 40 = 3240,
   15/81 = 15 × 40/81 × 40 = 600/3240
4. Subtract the two like fractions:
   7938/3240 - 600/3240 = 7938 - 600/3240 = 7338/3240
5. After reducing the fraction, the answer is 1223/540
6. In mixed form: 2143/540

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