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Add 15/56 and 21/63

15/56 + 21/63 is 101/168.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 63 is 504
  2. For the 1st fraction, since 56 × 9 = 504,
    15/56 = 15 × 9/56 × 9 = 135/504
  3. Likewise, for the 2nd fraction, since 63 × 8 = 504,
    21/63 = 21 × 8/63 × 8 = 168/504
  4. Add the two fractions:
    135/504 + 168/504 = 135 + 168/504 = 303/504
  5. After reducing the fraction, the answer is 101/168

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