Answers

Add 70/40 and 18/80

1^st number: 1 30/40, 2^nd number: 18/80

70/40 + 18/80 is 79/40.

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,
   18/80 = 18 × 1/80 × 1 = 18/80
4. Add the two like fractions:
   140/80 + 18/80 = 140 + 18/80 = 158/80
5. 158/80 simplified gives 79/40
6. So, 70/40 + 18/80 = 79/40
   In mixed form: 139/40

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