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Subtract 5/30 from 4/21

4/21 - 5/30 is 1/42.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 30 is 210
  2. For the 1st fraction, since 21 × 10 = 210,
    4/21 = 4 × 10/21 × 10 = 40/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    5/30 = 5 × 7/30 × 7 = 35/210
  4. Subtract the two fractions:
    40/210 - 35/210 = 40 - 35/210 = 5/210
  5. After reducing the fraction, the answer is 1/42

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