Answers

Add 1/54 and 15/21

1/54 + 15/21 is 277/378.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 21 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 54 × 7 = 378,
   1/54 = 1 × 7/54 × 7 = 7/378
3. Likewise, for the 2nd fraction, since 21 × 18 = 378,
   15/21 = 15 × 18/21 × 18 = 270/378
4. Add the two like fractions:
   7/378 + 270/378 = 7 + 270/378 = 277/378
5. So, 1/54 + 15/21 = 277/378

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