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Add 1/28 and 9/90

1/28 + 9/90 is 19/140.

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,
    1/28 = 1 × 45/28 × 45 = 45/1260
  3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
    9/90 = 9 × 14/90 × 14 = 126/1260
  4. Add the two fractions:
    45/1260 + 126/1260 = 45 + 126/1260 = 171/1260
  5. After reducing the fraction, the answer is 19/140

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