Answers

Subtract 5/81 from 7/4

1^st number: 1 3/4, 2^nd number: 5/81

7/4 - 5/81 is 547/324.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 81 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 4 × 81 = 324,
   7/4 = 7 × 81/4 × 81 = 567/324
3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
   5/81 = 5 × 4/81 × 4 = 20/324
4. Subtract the two like fractions:
   567/324 - 20/324 = 567 - 20/324 = 547/324
5. In mixed form: 1223/324

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