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Add 3/28 and 20/90

3/28 + 20/90 is 83/252.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 90 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 90 × 14 = 1260,
    20/90 = 20 × 14/90 × 14 = 280/1260
  4. Add the two fractions:
    135/1260 + 280/1260 = 135 + 280/1260 = 415/1260
  5. After reducing the fraction, the answer is 83/252

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