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Add 20/28 and 3/90

20/28 + 3/90 is 157/210.

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,
    20/28 = 20 × 45/28 × 45 = 900/1260
  3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
    3/90 = 3 × 14/90 × 14 = 42/1260
  4. Add the two fractions:
    900/1260 + 42/1260 = 900 + 42/1260 = 942/1260
  5. 942/1260 simplified gives 157/210
  6. So, 20/28 + 3/90 = 157/210

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