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Subtract 3/18 from 21/35

21/35 - 3/18 is 13/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 18 is 630
  2. For the 1st fraction, since 35 × 18 = 630,
    21/35 = 21 × 18/35 × 18 = 378/630
  3. Likewise, for the 2nd fraction, since 18 × 35 = 630,
    3/18 = 3 × 35/18 × 35 = 105/630
  4. Subtract the two fractions:
    378/630 - 105/630 = 378 - 105/630 = 273/630
  5. After reducing the fraction, the answer is 13/30

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