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Subtract 2/7 from 21/30

21/30 - 2/7 is 29/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 7 is 210
  2. For the 1st fraction, since 30 × 7 = 210,
    21/30 = 21 × 7/30 × 7 = 147/210
  3. Likewise, for the 2nd fraction, since 7 × 30 = 210,
    2/7 = 2 × 30/7 × 30 = 60/210
  4. Subtract the two fractions:
    147/210 - 60/210 = 147 - 60/210 = 87/210
  5. After reducing the fraction, the answer is 29/70

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