Answers

Add 42/21 and 45/36

1^st number: 2 0/21, 2^nd number: 1 9/36

42/21 + 45/36 is 13/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 36 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 21 × 12 = 252,
   42/21 = 42 × 12/21 × 12 = 504/252
3. Likewise, for the 2nd fraction, since 36 × 7 = 252,
   45/36 = 45 × 7/36 × 7 = 315/252
4. Add the two like fractions:
   504/252 + 315/252 = 504 + 315/252 = 819/252
5. 819/252 simplified gives 13/4
6. So, 42/21 + 45/36 = 13/4
   In mixed form: 31/4

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