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Subtract 9/70 from 1/30

1/30 - 9/70 is -2/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 70 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 30 × 7 = 210,
    1/30 = 1 × 7/30 × 7 = 7/210
  3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
    9/70 = 9 × 3/70 × 3 = 27/210
  4. Subtract the two like fractions:
    7/210 - 27/210 = 7 - 27/210 = -20/210
  5. After reducing the fraction, the answer is -2/21

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