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Subtract 8/40 from 20/90

20/90 - 8/40 is 1/45.

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,
    20/90 = 20 × 4/90 × 4 = 80/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    8/40 = 8 × 9/40 × 9 = 72/360
  4. Subtract the two fractions:
    80/360 - 72/360 = 80 - 72/360 = 8/360
  5. After reducing the fraction, the answer is 1/45

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