Answers

Add 98/8 and 81/90

1^st number: 12 2/8, 2^nd number: 81/90

98/8 + 81/90 is 263/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 90 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 8 × 45 = 360,
   98/8 = 98 × 45/8 × 45 = 4410/360
3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
   81/90 = 81 × 4/90 × 4 = 324/360
4. Add the two like fractions:
   4410/360 + 324/360 = 4410 + 324/360 = 4734/360
5. 4734/360 simplified gives 263/20
6. So, 98/8 + 81/90 = 263/20
   In mixed form: 133/20

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