Answers

Add 90/72 and 10/80

1^st number: 1 18/72, 2^nd number: 10/80

90/72 + 10/80 is 11/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 80 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 72 × 10 = 720,
   90/72 = 90 × 10/72 × 10 = 900/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   10/80 = 10 × 9/80 × 9 = 90/720
4. Add the two like fractions:
   900/720 + 90/720 = 900 + 90/720 = 990/720
5. 990/720 simplified gives 11/8
6. So, 90/72 + 10/80 = 11/8
   In mixed form: 13/8

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