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Add 15/63 and 28/54

15/63 + 28/54 is 143/189.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 54 is 378
  2. For the 1st fraction, since 63 × 6 = 378,
    15/63 = 15 × 6/63 × 6 = 90/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    28/54 = 28 × 7/54 × 7 = 196/378
  4. Add the two fractions:
    90/378 + 196/378 = 90 + 196/378 = 286/378
  5. 286/378 simplified gives 143/189
  6. So, 15/63 + 28/54 = 143/189

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