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Add 21/63 and 1/15

21/63 + 1/15 is 2/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 15 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 63 × 5 = 315,
    21/63 = 21 × 5/63 × 5 = 105/315
  3. Likewise, for the 2nd fraction, since 15 × 21 = 315,
    1/15 = 1 × 21/15 × 21 = 21/315
  4. Add the two like fractions:
    105/315 + 21/315 = 105 + 21/315 = 126/315
  5. 126/315 simplified gives 2/5
  6. So, 21/63 + 1/15 = 2/5

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