Answers

Add 90/6 and 80/60

1^st number: 15 0/6, 2^nd number: 1 20/60

90/6 + 80/60 is 49/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 6 and 60 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 6 × 10 = 60,
   90/6 = 90 × 10/6 × 10 = 900/60
3. Likewise, for the 2nd fraction, since 60 × 1 = 60,
   80/60 = 80 × 1/60 × 1 = 80/60
4. Add the two like fractions:
   900/60 + 80/60 = 900 + 80/60 = 980/60
5. 980/60 simplified gives 49/3
6. So, 90/6 + 80/60 = 49/3
   In mixed form: 161/3

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