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Subtract 56/40 from 20/18

1st number: 1 2/18, 2nd number: 1 16/40

20/18 - 56/40 is -13/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 40 is 360
  2. For the 1st fraction, since 18 × 20 = 360,
    20/18 = 20 × 20/18 × 20 = 400/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    56/40 = 56 × 9/40 × 9 = 504/360
  4. Subtract the two fractions:
    400/360 - 504/360 = 400 - 504/360 = -104/360
  5. After reducing the fraction, the answer is -13/45

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