Answers

Add 90/28 and 81/18

1^st number: 3 6/28, 2^nd number: 4 9/18

90/28 + 81/18 is 54/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 18 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 28 × 9 = 252,
   90/28 = 90 × 9/28 × 9 = 810/252
3. Likewise, for the 2nd fraction, since 18 × 14 = 252,
   81/18 = 81 × 14/18 × 14 = 1134/252
4. Add the two like fractions:
   810/252 + 1134/252 = 810 + 1134/252 = 1944/252
5. 1944/252 simplified gives 54/7
6. So, 90/28 + 81/18 = 54/7
   In mixed form: 75/7

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