Answers

Add 90/5 and 42/81

1^st number: 18 0/5, 2^nd number: 42/81

90/5 + 42/81 is 500/27.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 81 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 5 × 81 = 405,
   90/5 = 90 × 81/5 × 81 = 7290/405
3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
   42/81 = 42 × 5/81 × 5 = 210/405
4. Add the two like fractions:
   7290/405 + 210/405 = 7290 + 210/405 = 7500/405
5. 7500/405 simplified gives 500/27
6. So, 90/5 + 42/81 = 500/27
   In mixed form: 1814/27

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