Answers

Add 90/40 and 15/81

1^st number: 2 10/40, 2^nd number: 15/81

90/40 + 15/81 is 263/108.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 81 is 3240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3240
2. For the 1st fraction, since 40 × 81 = 3240,
   90/40 = 90 × 81/40 × 81 = 7290/3240
3. Likewise, for the 2nd fraction, since 81 × 40 = 3240,
   15/81 = 15 × 40/81 × 40 = 600/3240
4. Add the two like fractions:
   7290/3240 + 600/3240 = 7290 + 600/3240 = 7890/3240
5. 7890/3240 simplified gives 263/108
6. So, 90/40 + 15/81 = 263/108
   In mixed form: 247/108

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