Answers

Add 28/15 and 54/90

1^st number: 1 13/15, 2^nd number: 54/90

28/15 + 54/90 is 37/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 90 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 15 × 6 = 90,
   28/15 = 28 × 6/15 × 6 = 168/90
3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
   54/90 = 54 × 1/90 × 1 = 54/90
4. Add the two like fractions:
   168/90 + 54/90 = 168 + 54/90 = 222/90
5. 222/90 simplified gives 37/15
6. So, 28/15 + 54/90 = 37/15
   In mixed form: 27/15

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