Answers

Add 7/8 and 54/21

1^st number: 7/8, 2^nd number: 2 12/21

7/8 + 54/21 is 193/56.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 21 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 8 × 21 = 168,
   7/8 = 7 × 21/8 × 21 = 147/168
3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
   54/21 = 54 × 8/21 × 8 = 432/168
4. Add the two like fractions:
   147/168 + 432/168 = 147 + 432/168 = 579/168
5. 579/168 simplified gives 193/56
6. So, 7/8 + 54/21 = 193/56
   In mixed form: 325/56

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