Answers

Add 81/6 and 70/40

1^st number: 13 3/6, 2^nd number: 1 30/40

81/6 + 70/40 is 61/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 6 and 40 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 6 × 20 = 120,
   81/6 = 81 × 20/6 × 20 = 1620/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
   70/40 = 70 × 3/40 × 3 = 210/120
4. Add the two like fractions:
   1620/120 + 210/120 = 1620 + 210/120 = 1830/120
5. 1830/120 simplified gives 61/4
6. So, 81/6 + 70/40 = 61/4
   In mixed form: 151/4

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