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Add 3/28 and 9/20

3/28 + 9/20 is 39/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 20 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 28 × 5 = 140,
    3/28 = 3 × 5/28 × 5 = 15/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    9/20 = 9 × 7/20 × 7 = 63/140
  4. Add the two like fractions:
    15/140 + 63/140 = 15 + 63/140 = 78/140
  5. 78/140 simplified gives 39/70
  6. So, 3/28 + 9/20 = 39/70

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