Answers

Add 15/75 and 28/21

1^st number: 15/75, 2^nd number: 1 7/21

15/75 + 28/21 is 23/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 21 is 525
   
   Next, find the equivalent fraction of both fractional numbers with denominator 525
2. For the 1st fraction, since 75 × 7 = 525,
   15/75 = 15 × 7/75 × 7 = 105/525
3. Likewise, for the 2nd fraction, since 21 × 25 = 525,
   28/21 = 28 × 25/21 × 25 = 700/525
4. Add the two like fractions:
   105/525 + 700/525 = 105 + 700/525 = 805/525
5. 805/525 simplified gives 23/15
6. So, 15/75 + 28/21 = 23/15
   In mixed form: 18/15

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