Answers

Add 90/28 and 40/81

1^st number: 3 6/28, 2^nd number: 40/81

90/28 + 40/81 is 4205/1134.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 81 is 2268
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2268
2. For the 1st fraction, since 28 × 81 = 2268,
   90/28 = 90 × 81/28 × 81 = 7290/2268
3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
   40/81 = 40 × 28/81 × 28 = 1120/2268
4. Add the two like fractions:
   7290/2268 + 1120/2268 = 7290 + 1120/2268 = 8410/2268
5. 8410/2268 simplified gives 4205/1134
6. So, 90/28 + 40/81 = 4205/1134
   In mixed form: 3803/1134

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