Answers

Add 80/21 and 60/72

1^st number: 3 17/21, 2^nd number: 60/72

80/21 + 60/72 is 65/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 21 × 24 = 504,
   80/21 = 80 × 24/21 × 24 = 1920/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   60/72 = 60 × 7/72 × 7 = 420/504
4. Add the two like fractions:
   1920/504 + 420/504 = 1920 + 420/504 = 2340/504
5. 2340/504 simplified gives 65/14
6. So, 80/21 + 60/72 = 65/14
   In mixed form: 49/14

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