Answers

Subtract 40/24 from 81/63

1^st number: 1 18/63, 2^nd number: 1 16/24

81/63 - 40/24 is -8/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 24 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 63 × 8 = 504,
   81/63 = 81 × 8/63 × 8 = 648/504
3. Likewise, for the 2nd fraction, since 24 × 21 = 504,
   40/24 = 40 × 21/24 × 21 = 840/504
4. Subtract the two like fractions:
   648/504 - 840/504 = 648 - 840/504 = -192/504
5. After reducing the fraction, the answer is -8/21

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