Answers

Add 40/21 and 42/36

1^st number: 1 19/21, 2^nd number: 1 6/36

40/21 + 42/36 is 43/14.

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,
   40/21 = 40 × 12/21 × 12 = 480/252
3. Likewise, for the 2nd fraction, since 36 × 7 = 252,
   42/36 = 42 × 7/36 × 7 = 294/252
4. Add the two like fractions:
   480/252 + 294/252 = 480 + 294/252 = 774/252
5. 774/252 simplified gives 43/14
6. So, 40/21 + 42/36 = 43/14
   In mixed form: 31/14

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