Answers

Add 27/36 and 42/81

27/36 + 42/81 is 137/108.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 36 and 81 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 36 × 9 = 324,
   27/36 = 27 × 9/36 × 9 = 243/324
3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
   42/81 = 42 × 4/81 × 4 = 168/324
4. Add the two like fractions:
   243/324 + 168/324 = 243 + 168/324 = 411/324
5. 411/324 simplified gives 137/108
6. So, 27/36 + 42/81 = 137/108
   In mixed form: 129/108

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