Answers

Add 80/15 and 45/70

1^st number: 5 5/15, 2^nd number: 45/70

80/15 + 45/70 is 251/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 70 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 15 × 14 = 210,
   80/15 = 80 × 14/15 × 14 = 1120/210
3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
   45/70 = 45 × 3/70 × 3 = 135/210
4. Add the two like fractions:
   1120/210 + 135/210 = 1120 + 135/210 = 1255/210
5. 1255/210 simplified gives 251/42
6. So, 80/15 + 45/70 = 251/42
   In mixed form: 541/42

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