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Add 28/70 and 21/40

28/70 + 21/40 is 37/40.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 70 × 4 = 280,
    28/70 = 28 × 4/70 × 4 = 112/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    21/40 = 21 × 7/40 × 7 = 147/280
  4. Add the two like fractions:
    112/280 + 147/280 = 112 + 147/280 = 259/280
  5. 259/280 simplified gives 37/40
  6. So, 28/70 + 21/40 = 37/40

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