Answers

Add 90/10 and 90/80

1^st number: 9 0/10, 2^nd number: 1 10/80

90/10 + 90/80 is 81/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 10 × 8 = 80,
   90/10 = 90 × 8/10 × 8 = 720/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   90/80 = 90 × 1/80 × 1 = 90/80
4. Add the two like fractions:
   720/80 + 90/80 = 720 + 90/80 = 810/80
5. 810/80 simplified gives 81/8
6. So, 90/10 + 90/80 = 81/8
   In mixed form: 101/8

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