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Subtract 21/90 from 12/50

12/50 - 21/90 is 1/150.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 50 and 90 is 450

    Next, find the equivalent fraction of both fractional numbers with denominator 450
  2. For the 1st fraction, since 50 × 9 = 450,
    12/50 = 12 × 9/50 × 9 = 108/450
  3. Likewise, for the 2nd fraction, since 90 × 5 = 450,
    21/90 = 21 × 5/90 × 5 = 105/450
  4. Subtract the two like fractions:
    108/450 - 105/450 = 108 - 105/450 = 3/450
  5. After reducing the fraction, the answer is 1/150

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