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Add 6/70 and 21/90

6/70 + 21/90 is 67/210.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 70 × 9 = 630,
    6/70 = 6 × 9/70 × 9 = 54/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    21/90 = 21 × 7/90 × 7 = 147/630
  4. Add the two like fractions:
    54/630 + 147/630 = 54 + 147/630 = 201/630
  5. 201/630 simplified gives 67/210
  6. So, 6/70 + 21/90 = 67/210

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