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Add 60/63 and 21/70

60/63 + 21/70 is 263/210.

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,
    60/63 = 60 × 10/63 × 10 = 600/630
  3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
    21/70 = 21 × 9/70 × 9 = 189/630
  4. Add the two fractions:
    600/630 + 189/630 = 600 + 189/630 = 789/630
  5. After reducing the fraction, the answer is 263/210
  6. In mixed form: 153/210

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