Answers

Add 25/15 and 54/21

1^st number: 1 10/15, 2^nd number: 2 12/21

25/15 + 54/21 is 89/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 21 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 15 × 7 = 105,
   25/15 = 25 × 7/15 × 7 = 175/105
3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
   54/21 = 54 × 5/21 × 5 = 270/105
4. Add the two like fractions:
   175/105 + 270/105 = 175 + 270/105 = 445/105
5. 445/105 simplified gives 89/21
6. So, 25/15 + 54/21 = 89/21
   In mixed form: 45/21

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