Answers

Subtract 40/18 from 54/21

1^st number: 2 12/21, 2^nd number: 2 4/18

54/21 - 40/18 is 22/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 18 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 21 × 6 = 126,
   54/21 = 54 × 6/21 × 6 = 324/126
3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
   40/18 = 40 × 7/18 × 7 = 280/126
4. Subtract the two like fractions:
   324/126 - 280/126 = 324 - 280/126 = 44/126
5. After reducing the fraction, the answer is 22/63

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