Answers

Add 90/8 and 15/20

1^st number: 11 2/8, 2^nd number: 15/20

90/8 + 15/20 is 12/1.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 20 is 40
   
   Next, find the equivalent fraction of both fractional numbers with denominator 40
2. For the 1st fraction, since 8 × 5 = 40,
   90/8 = 90 × 5/8 × 5 = 450/40
3. Likewise, for the 2nd fraction, since 20 × 2 = 40,
   15/20 = 15 × 2/20 × 2 = 30/40
4. Add the two like fractions:
   450/40 + 30/40 = 450 + 30/40 = 480/40
5. 480/40 simplified gives 12/1
6. So, 90/8 + 15/20 = 12/1

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