Answers

Add 28/12 and 42/90

1^st number: 2 4/12, 2^nd number: 42/90

28/12 + 42/90 is 14/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 12 × 15 = 180,
   28/12 = 28 × 15/12 × 15 = 420/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   42/90 = 42 × 2/90 × 2 = 84/180
4. Add the two like fractions:
   420/180 + 84/180 = 420 + 84/180 = 504/180
5. 504/180 simplified gives 14/5
6. So, 28/12 + 42/90 = 14/5
   In mixed form: 24/5

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