Answers

Add 80/72 and 60/90

1^st number: 1 8/72, 2^nd number: 60/90

80/72 + 60/90 is 16/9.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 90 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 72 × 5 = 360,
   80/72 = 80 × 5/72 × 5 = 400/360
3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
   60/90 = 60 × 4/90 × 4 = 240/360
4. Add the two like fractions:
   400/360 + 240/360 = 400 + 240/360 = 640/360
5. 640/360 simplified gives 16/9
6. So, 80/72 + 60/90 = 16/9
   In mixed form: 17/9

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