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Add 3/90 and 9/40

3/90 + 9/40 is 31/120.

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,
    3/90 = 3 × 4/90 × 4 = 12/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    9/40 = 9 × 9/40 × 9 = 81/360
  4. Add the two like fractions:
    12/360 + 81/360 = 12 + 81/360 = 93/360
  5. 93/360 simplified gives 31/120
  6. So, 3/90 + 9/40 = 31/120

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