Answers

Add 54/15 and 42/54

1^st number: 3 9/15, 2^nd number: 42/54

54/15 + 42/54 is 197/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 54 is 270
   
   Next, find the equivalent fraction of both fractional numbers with denominator 270
2. For the 1st fraction, since 15 × 18 = 270,
   54/15 = 54 × 18/15 × 18 = 972/270
3. Likewise, for the 2nd fraction, since 54 × 5 = 270,
   42/54 = 42 × 5/54 × 5 = 210/270
4. Add the two like fractions:
   972/270 + 210/270 = 972 + 210/270 = 1182/270
5. 1182/270 simplified gives 197/45
6. So, 54/15 + 42/54 = 197/45
   In mixed form: 417/45

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