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Add 10/63 and 21/60

10/63 + 21/60 is 641/1260.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 60 is 1260
  2. For the 1st fraction, since 63 × 20 = 1260,
    10/63 = 10 × 20/63 × 20 = 200/1260
  3. Likewise, for the 2nd fraction, since 60 × 21 = 1260,
    21/60 = 21 × 21/60 × 21 = 441/1260
  4. Add the two fractions:
    200/1260 + 441/1260 = 200 + 441/1260 = 641/1260
  5. So, 10/63 + 21/60 = 641/1260

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