Answers

Add 21/42 and 54/48

1^st number: 21/42, 2^nd number: 1 6/48

21/42 + 54/48 is 13/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 48 is 336
   
   Next, find the equivalent fraction of both fractional numbers with denominator 336
2. For the 1st fraction, since 42 × 8 = 336,
   21/42 = 21 × 8/42 × 8 = 168/336
3. Likewise, for the 2nd fraction, since 48 × 7 = 336,
   54/48 = 54 × 7/48 × 7 = 378/336
4. Add the two like fractions:
   168/336 + 378/336 = 168 + 378/336 = 546/336
5. 546/336 simplified gives 13/8
6. So, 21/42 + 54/48 = 13/8
   In mixed form: 15/8

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