Answers

Add 12/72 and 80/63

1^st number: 12/72, 2^nd number: 1 17/63

12/72 + 80/63 is 181/126.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 63 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   12/72 = 12 × 7/72 × 7 = 84/504
3. Likewise, for the 2nd fraction, since 63 × 8 = 504,
   80/63 = 80 × 8/63 × 8 = 640/504
4. Add the two like fractions:
   84/504 + 640/504 = 84 + 640/504 = 724/504
5. 724/504 simplified gives 181/126
6. So, 12/72 + 80/63 = 181/126
   In mixed form: 155/126

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