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Subtract 15/32 from 21/40

21/40 - 15/32 is 9/160.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 32 is 160

    Next, find the equivalent fraction of both fractional numbers with denominator 160
  2. For the 1st fraction, since 40 × 4 = 160,
    21/40 = 21 × 4/40 × 4 = 84/160
  3. Likewise, for the 2nd fraction, since 32 × 5 = 160,
    15/32 = 15 × 5/32 × 5 = 75/160
  4. Subtract the two like fractions:
    84/160 - 75/160 = 84 - 75/160 = 9/160

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