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Add 1/70 and 21/90

1/70 + 21/90 is 26/105.

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,
    1/70 = 1 × 9/70 × 9 = 9/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    21/90 = 21 × 7/90 × 7 = 147/630
  4. Add the two fractions:
    9/630 + 147/630 = 9 + 147/630 = 156/630
  5. 156/630 simplified gives 26/105
  6. So, 1/70 + 21/90 = 26/105

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