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Add 28/72 and 9/90

28/72 + 9/90 is 22/45.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 90 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 72 × 5 = 360,
    28/72 = 28 × 5/72 × 5 = 140/360
  3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
    9/90 = 9 × 4/90 × 4 = 36/360
  4. Add the two like fractions:
    140/360 + 36/360 = 140 + 36/360 = 176/360
  5. 176/360 simplified gives 22/45
  6. So, 28/72 + 9/90 = 22/45

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