Answers

Add 40/18 and 45/21

1^st number: 2 4/18, 2^nd number: 2 3/21

40/18 + 45/21 is 275/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 21 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 18 × 7 = 126,
   40/18 = 40 × 7/18 × 7 = 280/126
3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
   45/21 = 45 × 6/21 × 6 = 270/126
4. Add the two like fractions:
   280/126 + 270/126 = 280 + 270/126 = 550/126
5. 550/126 simplified gives 275/63
6. So, 40/18 + 45/21 = 275/63
   In mixed form: 423/63

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