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Add 9/70 and 70/90

9/70 + 70/90 is 571/630.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 90 is 630
  2. For the 1st fraction, since 70 × 9 = 630,
    9/70 = 9 × 9/70 × 9 = 81/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    70/90 = 70 × 7/90 × 7 = 490/630
  4. Add the two fractions:
    81/630 + 490/630 = 81 + 490/630 = 571/630

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