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Subtract 9/40 from 1/10

1/10 - 9/40 is -1/8.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 40 is 40
  2. For the 1st fraction, since 10 × 4 = 40,
    1/10 = 1 × 4/10 × 4 = 4/40
  3. Likewise, for the 2nd fraction, since 40 × 1 = 40,
    9/40 = 9 × 1/40 × 1 = 9/40
  4. Subtract the two fractions:
    4/40 - 9/40 = 4 - 9/40 = -5/40
  5. After reducing the fraction, the answer is -1/8

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