Answers

Add 54/21 and 90/64

1^st number: 2 12/21, 2^nd number: 1 26/64

54/21 + 90/64 is 891/224.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 64 is 1344
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1344
2. For the 1st fraction, since 21 × 64 = 1344,
   54/21 = 54 × 64/21 × 64 = 3456/1344
3. Likewise, for the 2nd fraction, since 64 × 21 = 1344,
   90/64 = 90 × 21/64 × 21 = 1890/1344
4. Add the two like fractions:
   3456/1344 + 1890/1344 = 3456 + 1890/1344 = 5346/1344
5. 5346/1344 simplified gives 891/224
6. So, 54/21 + 90/64 = 891/224
   In mixed form: 3219/224

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