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Add 3/40 and 42/70

3/40 + 42/70 is 27/40.

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,
    3/40 = 3 × 7/40 × 7 = 21/280
  3. Likewise, for the 2nd fraction, since 70 × 4 = 280,
    42/70 = 42 × 4/70 × 4 = 168/280
  4. Add the two like fractions:
    21/280 + 168/280 = 21 + 168/280 = 189/280
  5. 189/280 simplified gives 27/40
  6. So, 3/40 + 42/70 = 27/40

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