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Add 7/28 and 20/90

7/28 + 20/90 is 17/36.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 90 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 28 × 45 = 1260,
    7/28 = 7 × 45/28 × 45 = 315/1260
  3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
    20/90 = 20 × 14/90 × 14 = 280/1260
  4. Add the two like fractions:
    315/1260 + 280/1260 = 315 + 280/1260 = 595/1260
  5. 595/1260 simplified gives 17/36
  6. So, 7/28 + 20/90 = 17/36

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