Answers

Add 70/12 and 18/80

1^st number: 5 10/12, 2^nd number: 18/80

70/12 + 18/80 is 727/120.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 12 × 20 = 240,
   70/12 = 70 × 20/12 × 20 = 1400/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   18/80 = 18 × 3/80 × 3 = 54/240
4. Add the two like fractions:
   1400/240 + 54/240 = 1400 + 54/240 = 1454/240
5. 1454/240 simplified gives 727/120
6. So, 70/12 + 18/80 = 727/120
   In mixed form: 67/120

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