Answers

Subtract 98/81 from 90/63

1^st number: 1 27/63, 2^nd number: 1 17/81

90/63 - 98/81 is 124/567.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 81 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 63 × 9 = 567,
   90/63 = 90 × 9/63 × 9 = 810/567
3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
   98/81 = 98 × 7/81 × 7 = 686/567
4. Subtract the two like fractions:
   810/567 - 686/567 = 810 - 686/567 = 124/567

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