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Subtract 8/9 from 8/40

8/40 - 8/9 is -31/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 9 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 40 × 9 = 360,
    8/40 = 8 × 9/40 × 9 = 72/360
  3. Likewise, for the 2nd fraction, since 9 × 40 = 360,
    8/9 = 8 × 40/9 × 40 = 320/360
  4. Subtract the two like fractions:
    72/360 - 320/360 = 72 - 320/360 = -248/360
  5. After reducing the fraction, the answer is -31/45

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