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Subtract 4/20 from 8/9

8/9 - 4/20 is 31/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 20 is 180
  2. For the 1st fraction, since 9 × 20 = 180,
    8/9 = 8 × 20/9 × 20 = 160/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    4/20 = 4 × 9/20 × 9 = 36/180
  4. Subtract the two fractions:
    160/180 - 36/180 = 160 - 36/180 = 124/180
  5. After reducing the fraction, the answer is 31/45

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