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Add 4/28 and 7/90

4/28 + 7/90 is 139/630.

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,
    4/28 = 4 × 45/28 × 45 = 180/1260
  3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
    7/90 = 7 × 14/90 × 14 = 98/1260
  4. Add the two fractions:
    180/1260 + 98/1260 = 180 + 98/1260 = 278/1260
  5. After reducing the fraction, the answer is 139/630

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