Answers

Add 84/15 and 80/18

1^st number: 5 9/15, 2^nd number: 4 8/18

84/15 + 80/18 is 452/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 18 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 15 × 6 = 90,
   84/15 = 84 × 6/15 × 6 = 504/90
3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
   80/18 = 80 × 5/18 × 5 = 400/90
4. Add the two like fractions:
   504/90 + 400/90 = 504 + 400/90 = 904/90
5. 904/90 simplified gives 452/45
6. So, 84/15 + 80/18 = 452/45
   In mixed form: 102/45

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