Answers

Add 90/60 and 20/81

1^st number: 1 30/60, 2^nd number: 20/81

90/60 + 20/81 is 283/162.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 81 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 60 × 27 = 1620,
   90/60 = 90 × 27/60 × 27 = 2430/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   20/81 = 20 × 20/81 × 20 = 400/1620
4. Add the two like fractions:
   2430/1620 + 400/1620 = 2430 + 400/1620 = 2830/1620
5. 2830/1620 simplified gives 283/162
6. So, 90/60 + 20/81 = 283/162
   In mixed form: 1121/162

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