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Add 30/63 and 21/70

30/63 + 21/70 is 163/210.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 70 is 630
  2. For the 1st fraction, since 63 × 10 = 630,
    30/63 = 30 × 10/63 × 10 = 300/630
  3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
    21/70 = 21 × 9/70 × 9 = 189/630
  4. Add the two fractions:
    300/630 + 189/630 = 300 + 189/630 = 489/630
  5. After reducing the fraction, the answer is 163/210

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