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Subtract 50/72 from 40/90

40/90 - 50/72 is -1/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 72 is 360
  2. For the 1st fraction, since 90 × 4 = 360,
    40/90 = 40 × 4/90 × 4 = 160/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    50/72 = 50 × 5/72 × 5 = 250/360
  4. Subtract the two fractions:
    160/360 - 250/360 = 160 - 250/360 = -90/360
  5. After reducing the fraction, the answer is -1/4

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