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Subtract 4/40 from 8/90

8/90 - 4/40 is -1/90.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 40 is 360
  2. For the 1st fraction, since 90 × 4 = 360,
    8/90 = 8 × 4/90 × 4 = 32/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    4/40 = 4 × 9/40 × 9 = 36/360
  4. Subtract the two fractions:
    32/360 - 36/360 = 32 - 36/360 = -4/360
  5. After reducing the fraction, the answer is -1/90

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