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Add 81/90 and 4/70

81/90 + 4/70 is 67/70.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 90 × 7 = 630,
    81/90 = 81 × 7/90 × 7 = 567/630
  3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
    4/70 = 4 × 9/70 × 9 = 36/630
  4. Add the two like fractions:
    567/630 + 36/630 = 567 + 36/630 = 603/630
  5. 603/630 simplified gives 67/70
  6. So, 81/90 + 4/70 = 67/70

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