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Add 28/7 and 21/54

1st number: 4 0/7, 2nd number: 21/54

28/7 + 21/54 is 79/18.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 54 is 378
  2. For the 1st fraction, since 7 × 54 = 378,
    28/7 = 28 × 54/7 × 54 = 1512/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    21/54 = 21 × 7/54 × 7 = 147/378
  4. Add the two fractions:
    1512/378 + 147/378 = 1512 + 147/378 = 1659/378
  5. 1659/378 simplified gives 79/18
  6. So, 28/7 + 21/54 = 79/18
    In mixed form: 47/18

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