Answers

Add 84/21 and 15/48

1^st number: 4 0/21, 2^nd number: 15/48

84/21 + 15/48 is 69/16.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 48 is 336
   
   Next, find the equivalent fraction of both fractional numbers with denominator 336
2. For the 1st fraction, since 21 × 16 = 336,
   84/21 = 84 × 16/21 × 16 = 1344/336
3. Likewise, for the 2nd fraction, since 48 × 7 = 336,
   15/48 = 15 × 7/48 × 7 = 105/336
4. Add the two like fractions:
   1344/336 + 105/336 = 1344 + 105/336 = 1449/336
5. 1449/336 simplified gives 69/16
6. So, 84/21 + 15/48 = 69/16
   In mixed form: 45/16

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