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Subtract 3/18 from 7/40

7/40 - 3/18 is 1/120.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 18 is 360
  2. For the 1st fraction, since 40 × 9 = 360,
    7/40 = 7 × 9/40 × 9 = 63/360
  3. Likewise, for the 2nd fraction, since 18 × 20 = 360,
    3/18 = 3 × 20/18 × 20 = 60/360
  4. Subtract the two fractions:
    63/360 - 60/360 = 63 - 60/360 = 3/360
  5. After reducing the fraction, the answer is 1/120

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