Answers

Add 28/21 and 42/9

1^st number: 1 7/21, 2^nd number: 4 6/9

28/21 + 42/9 is 6/1.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 9 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 21 × 3 = 63,
   28/21 = 28 × 3/21 × 3 = 84/63
3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
   42/9 = 42 × 7/9 × 7 = 294/63
4. Add the two like fractions:
   84/63 + 294/63 = 84 + 294/63 = 378/63
5. 378/63 simplified gives 6/1
6. So, 28/21 + 42/9 = 6/1

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