Answers

Add 1/28 and 20/81

1/28 + 20/81 is 641/2268.

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,
   1/28 = 1 × 81/28 × 81 = 81/2268
3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
   20/81 = 20 × 28/81 × 28 = 560/2268
4. Add the two like fractions:
   81/2268 + 560/2268 = 81 + 560/2268 = 641/2268
5. So, 1/28 + 20/81 = 641/2268

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