Answers

Add 90/15 and 70/80

1^st number: 6 0/15, 2^nd number: 70/80

90/15 + 70/80 is 55/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 15 × 16 = 240,
   90/15 = 90 × 16/15 × 16 = 1440/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   70/80 = 70 × 3/80 × 3 = 210/240
4. Add the two like fractions:
   1440/240 + 210/240 = 1440 + 210/240 = 1650/240
5. 1650/240 simplified gives 55/8
6. So, 90/15 + 70/80 = 55/8
   In mixed form: 67/8

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