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Add 27/40 and 21/70

27/40 + 21/70 is 39/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 70 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 40 × 7 = 280,
    27/40 = 27 × 7/40 × 7 = 189/280
  3. Likewise, for the 2nd fraction, since 70 × 4 = 280,
    21/70 = 21 × 4/70 × 4 = 84/280
  4. Add the two like fractions:
    189/280 + 84/280 = 189 + 84/280 = 273/280
  5. 273/280 simplified gives 39/40
  6. So, 27/40 + 21/70 = 39/40

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