Answers

Add 40/21 and 80/45

1^st number: 1 19/21, 2^nd number: 1 35/45

40/21 + 80/45 is 232/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 45 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 21 × 15 = 315,
   40/21 = 40 × 15/21 × 15 = 600/315
3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
   80/45 = 80 × 7/45 × 7 = 560/315
4. Add the two like fractions:
   600/315 + 560/315 = 600 + 560/315 = 1160/315
5. 1160/315 simplified gives 232/63
6. So, 40/21 + 80/45 = 232/63
   In mixed form: 343/63

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