Answers

Add 5/15 and 81/40

1^st number: 5/15, 2^nd number: 2 1/40

5/15 + 81/40 is 283/120.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 40 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 15 × 8 = 120,
   5/15 = 5 × 8/15 × 8 = 40/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
   81/40 = 81 × 3/40 × 3 = 243/120
4. Add the two like fractions:
   40/120 + 243/120 = 40 + 243/120 = 283/120
5. So, 5/15 + 81/40 = 283/120
   In mixed form: 243/120

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