Answers

Add 54/21 and 70/48

1^st number: 2 12/21, 2^nd number: 1 22/48

54/21 + 70/48 is 677/168.

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,
   54/21 = 54 × 16/21 × 16 = 864/336
3. Likewise, for the 2nd fraction, since 48 × 7 = 336,
   70/48 = 70 × 7/48 × 7 = 490/336
4. Add the two like fractions:
   864/336 + 490/336 = 864 + 490/336 = 1354/336
5. 1354/336 simplified gives 677/168
6. So, 54/21 + 70/48 = 677/168
   In mixed form: 45/168

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