Answers

Add 90/80 and 63/4

1^st number: 1 10/80, 2^nd number: 15 3/4

90/80 + 63/4 is 135/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 4 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 80 × 1 = 80,
   90/80 = 90 × 1/80 × 1 = 90/80
3. Likewise, for the 2nd fraction, since 4 × 20 = 80,
   63/4 = 63 × 20/4 × 20 = 1260/80
4. Add the two like fractions:
   90/80 + 1260/80 = 90 + 1260/80 = 1350/80
5. 1350/80 simplified gives 135/8
6. So, 90/80 + 63/4 = 135/8
   In mixed form: 167/8

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