Answers

Add 70/40 and 45/80

1^st number: 1 30/40, 2^nd number: 45/80

70/40 + 45/80 is 37/16.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 40 × 2 = 80,
   70/40 = 70 × 2/40 × 2 = 140/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   45/80 = 45 × 1/80 × 1 = 45/80
4. Add the two like fractions:
   140/80 + 45/80 = 140 + 45/80 = 185/80
5. 185/80 simplified gives 37/16
6. So, 70/40 + 45/80 = 37/16
   In mixed form: 25/16

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