Answers

Add 7/35 and 42/21

1^st number: 7/35, 2^nd number: 2 0/21

7/35 + 42/21 is 11/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 35 and 21 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 35 × 3 = 105,
   7/35 = 7 × 3/35 × 3 = 21/105
3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
   42/21 = 42 × 5/21 × 5 = 210/105
4. Add the two like fractions:
   21/105 + 210/105 = 21 + 210/105 = 231/105
5. 231/105 simplified gives 11/5
6. So, 7/35 + 42/21 = 11/5
   In mixed form: 21/5

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