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Add 15/25 and 21/63

15/25 + 21/63 is 14/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 25 and 63 is 1575

    Next, find the equivalent fraction of both fractional numbers with denominator 1575
  2. For the 1st fraction, since 25 × 63 = 1575,
    15/25 = 15 × 63/25 × 63 = 945/1575
  3. Likewise, for the 2nd fraction, since 63 × 25 = 1575,
    21/63 = 21 × 25/63 × 25 = 525/1575
  4. Add the two like fractions:
    945/1575 + 525/1575 = 945 + 525/1575 = 1470/1575
  5. 1470/1575 simplified gives 14/15
  6. So, 15/25 + 21/63 = 14/15

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