Answers

Add 7/54 and 9/21

7/54 + 9/21 is 211/378.

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,
   7/54 = 7 × 7/54 × 7 = 49/378
3. Likewise, for the 2nd fraction, since 21 × 18 = 378,
   9/21 = 9 × 18/21 × 18 = 162/378
4. Add the two like fractions:
   49/378 + 162/378 = 49 + 162/378 = 211/378
5. So, 7/54 + 9/21 = 211/378

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