Answers

Add 40/15 and 72/63

1^st number: 2 10/15, 2^nd number: 1 9/63

40/15 + 72/63 is 80/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 63 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 15 × 21 = 315,
   40/15 = 40 × 21/15 × 21 = 840/315
3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
   72/63 = 72 × 5/63 × 5 = 360/315
4. Add the two like fractions:
   840/315 + 360/315 = 840 + 360/315 = 1200/315
5. 1200/315 simplified gives 80/21
6. So, 40/15 + 72/63 = 80/21
   In mixed form: 317/21

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