Answers

Add 90/12 and 90/80

1^st number: 7 6/12, 2^nd number: 1 10/80

90/12 + 90/80 is 69/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 12 × 20 = 240,
   90/12 = 90 × 20/12 × 20 = 1800/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   90/80 = 90 × 3/80 × 3 = 270/240
4. Add the two like fractions:
   1800/240 + 270/240 = 1800 + 270/240 = 2070/240
5. 2070/240 simplified gives 69/8
6. So, 90/12 + 90/80 = 69/8
   In mixed form: 85/8

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