Answers

Add 40/9 and 45/21

1^st number: 4 4/9, 2^nd number: 2 3/21

40/9 + 45/21 is 415/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 21 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 9 × 7 = 63,
   40/9 = 40 × 7/9 × 7 = 280/63
3. Likewise, for the 2nd fraction, since 21 × 3 = 63,
   45/21 = 45 × 3/21 × 3 = 135/63
4. Add the two like fractions:
   280/63 + 135/63 = 280 + 135/63 = 415/63
5. So, 40/9 + 45/21 = 415/63
   In mixed form: 637/63

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