Answers

Add 80/45 and 70/12

1^st number: 1 35/45, 2^nd number: 5 10/12

80/45 + 70/12 is 137/18.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 12 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 45 × 4 = 180,
   80/45 = 80 × 4/45 × 4 = 320/180
3. Likewise, for the 2nd fraction, since 12 × 15 = 180,
   70/12 = 70 × 15/12 × 15 = 1050/180
4. Add the two like fractions:
   320/180 + 1050/180 = 320 + 1050/180 = 1370/180
5. 1370/180 simplified gives 137/18
6. So, 80/45 + 70/12 = 137/18
   In mixed form: 711/18

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