Answers

Add 15/4 and 42/81

1^st number: 3 3/4, 2^nd number: 42/81

15/4 + 42/81 is 461/108.

Steps for adding 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,
   15/4 = 15 × 81/4 × 81 = 1215/324
3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
   42/81 = 42 × 4/81 × 4 = 168/324
4. Add the two like fractions:
   1215/324 + 168/324 = 1215 + 168/324 = 1383/324
5. 1383/324 simplified gives 461/108
6. So, 15/4 + 42/81 = 461/108
   In mixed form: 429/108

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