Answers

Add 8/72 and 9/80

8/72 + 9/80 is 161/720.

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,
   8/72 = 8 × 10/72 × 10 = 80/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   9/80 = 9 × 9/80 × 9 = 81/720
4. Add the two like fractions:
   80/720 + 81/720 = 80 + 81/720 = 161/720
5. So, 8/72 + 9/80 = 161/720

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