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Add 10/15 and 21/63

10/15 + 21/63 is 1/1.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 63 is 315
  2. For the 1st fraction, since 15 × 21 = 315,
    10/15 = 10 × 21/15 × 21 = 210/315
  3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
    21/63 = 21 × 5/63 × 5 = 105/315
  4. Add the two fractions:
    210/315 + 105/315 = 210 + 105/315 = 315/315
  5. After reducing the fraction, the answer is 1/1

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