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Subtract 18/30 from 21/32

21/32 - 18/30 is 9/160.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 32 and 30 is 480

    Next, find the equivalent fraction of both fractional numbers with denominator 480
  2. For the 1st fraction, since 32 × 15 = 480,
    21/32 = 21 × 15/32 × 15 = 315/480
  3. Likewise, for the 2nd fraction, since 30 × 16 = 480,
    18/30 = 18 × 16/30 × 16 = 288/480
  4. Subtract the two like fractions:
    315/480 - 288/480 = 315 - 288/480 = 27/480
  5. After reducing the fraction, the answer is 9/160

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