Answers

Add 1/21 and 45/42

1^st number: 1/21, 2^nd number: 1 3/42

1/21 + 45/42 is 47/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 42 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 21 × 2 = 42,
   1/21 = 1 × 2/21 × 2 = 2/42
3. Likewise, for the 2nd fraction, since 42 × 1 = 42,
   45/42 = 45 × 1/42 × 1 = 45/42
4. Add the two like fractions:
   2/42 + 45/42 = 2 + 45/42 = 47/42
5. So, 1/21 + 45/42 = 47/42
   In mixed form: 15/42

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