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Add 28/63 and 15/40

28/63 + 15/40 is 59/72.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 40 is 2520
  2. For the 1st fraction, since 63 × 40 = 2520,
    28/63 = 28 × 40/63 × 40 = 1120/2520
  3. Likewise, for the 2nd fraction, since 40 × 63 = 2520,
    15/40 = 15 × 63/40 × 63 = 945/2520
  4. Add the two fractions:
    1120/2520 + 945/2520 = 1120 + 945/2520 = 2065/2520
  5. After reducing the fraction, the answer is 59/72

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