Answers

Subtract 81/21 from 54/4

1^st number: 13 2/4, 2^nd number: 3 18/21

54/4 - 81/21 is 135/14.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 21 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 4 × 21 = 84,
   54/4 = 54 × 21/4 × 21 = 1134/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   81/21 = 81 × 4/21 × 4 = 324/84
4. Subtract the two like fractions:
   1134/84 - 324/84 = 1134 - 324/84 = 810/84
5. After reducing the fraction, the answer is 135/14
6. In mixed form: 99/14

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