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Subtract 9/40 from 3/45

3/45 - 9/40 is -19/120.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 40 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 45 × 8 = 360,
    3/45 = 3 × 8/45 × 8 = 24/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    9/40 = 9 × 9/40 × 9 = 81/360
  4. Subtract the two like fractions:
    24/360 - 81/360 = 24 - 81/360 = -57/360
  5. After reducing the fraction, the answer is -19/120

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