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Add 10/30 and 21/63

10/30 + 21/63 is 2/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 63 is 630
  2. For the 1st fraction, since 30 × 21 = 630,
    10/30 = 10 × 21/30 × 21 = 210/630
  3. Likewise, for the 2nd fraction, since 63 × 10 = 630,
    21/63 = 21 × 10/63 × 10 = 210/630
  4. Add the two fractions:
    210/630 + 210/630 = 210 + 210/630 = 420/630
  5. After reducing the fraction, the answer is 2/3

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