Answers

Add 84/28 and 90/15

1^st number: 3 0/28, 2^nd number: 6 0/15

84/28 + 90/15 is 9/1.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 15 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 28 × 15 = 420,
   84/28 = 84 × 15/28 × 15 = 1260/420
3. Likewise, for the 2nd fraction, since 15 × 28 = 420,
   90/15 = 90 × 28/15 × 28 = 2520/420
4. Add the two like fractions:
   1260/420 + 2520/420 = 1260 + 2520/420 = 3780/420
5. 3780/420 simplified gives 9/1
6. So, 84/28 + 90/15 = 9/1

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