Answers

Add 15/81 and 60/40

1^st number: 15/81, 2^nd number: 1 20/40

15/81 + 60/40 is 91/54.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 40 is 3240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3240
2. For the 1st fraction, since 81 × 40 = 3240,
   15/81 = 15 × 40/81 × 40 = 600/3240
3. Likewise, for the 2nd fraction, since 40 × 81 = 3240,
   60/40 = 60 × 81/40 × 81 = 4860/3240
4. Add the two like fractions:
   600/3240 + 4860/3240 = 600 + 4860/3240 = 5460/3240
5. 5460/3240 simplified gives 91/54
6. So, 15/81 + 60/40 = 91/54
   In mixed form: 137/54

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