Answers

Add 42/45 and 90/81

1^st number: 42/45, 2^nd number: 1 9/81

42/45 + 90/81 is 92/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 81 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 45 × 9 = 405,
   42/45 = 42 × 9/45 × 9 = 378/405
3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
   90/81 = 90 × 5/81 × 5 = 450/405
4. Add the two like fractions:
   378/405 + 450/405 = 378 + 450/405 = 828/405
5. 828/405 simplified gives 92/45
6. So, 42/45 + 90/81 = 92/45
   In mixed form: 22/45

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