Answers

Add 15/54 and 35/21

1^st number: 15/54, 2^nd number: 1 14/21

15/54 + 35/21 is 35/18.

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,
   15/54 = 15 × 7/54 × 7 = 105/378
3. Likewise, for the 2nd fraction, since 21 × 18 = 378,
   35/21 = 35 × 18/21 × 18 = 630/378
4. Add the two like fractions:
   105/378 + 630/378 = 105 + 630/378 = 735/378
5. 735/378 simplified gives 35/18
6. So, 15/54 + 35/21 = 35/18
   In mixed form: 117/18

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