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Add 9/90 and 18/40

9/90 + 18/40 is 11/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 40 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 90 × 4 = 360,
    9/90 = 9 × 4/90 × 4 = 36/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    18/40 = 18 × 9/40 × 9 = 162/360
  4. Add the two like fractions:
    36/360 + 162/360 = 36 + 162/360 = 198/360
  5. 198/360 simplified gives 11/20
  6. So, 9/90 + 18/40 = 11/20

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