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Add 8/28 and 30/90

8/28 + 30/90 is 13/21.

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,
    8/28 = 8 × 45/28 × 45 = 360/1260
  3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
    30/90 = 30 × 14/90 × 14 = 420/1260
  4. Add the two fractions:
    360/1260 + 420/1260 = 360 + 420/1260 = 780/1260
  5. After reducing the fraction, the answer is 13/21

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