Answers

Add 28/21 and 56/49

1^st number: 1 7/21, 2^nd number: 1 7/49

28/21 + 56/49 is 52/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 49 is 147
   
   Next, find the equivalent fraction of both fractional numbers with denominator 147
2. For the 1st fraction, since 21 × 7 = 147,
   28/21 = 28 × 7/21 × 7 = 196/147
3. Likewise, for the 2nd fraction, since 49 × 3 = 147,
   56/49 = 56 × 3/49 × 3 = 168/147
4. Add the two like fractions:
   196/147 + 168/147 = 196 + 168/147 = 364/147
5. 364/147 simplified gives 52/21
6. So, 28/21 + 56/49 = 52/21
   In mixed form: 210/21

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