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Add 3/28 and 20/45

3/28 + 20/45 is 139/252.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 45 is 1260
  2. For the 1st fraction, since 28 × 45 = 1260,
    3/28 = 3 × 45/28 × 45 = 135/1260
  3. Likewise, for the 2nd fraction, since 45 × 28 = 1260,
    20/45 = 20 × 28/45 × 28 = 560/1260
  4. Add the two fractions:
    135/1260 + 560/1260 = 135 + 560/1260 = 695/1260
  5. After reducing the fraction, the answer is 139/252

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