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Subtract 4/70 from 21/30

21/30 - 4/70 is 9/14.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 70 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 70 × 3 = 210,
    4/70 = 4 × 3/70 × 3 = 12/210
  4. Subtract the two fractions:
    147/210 - 12/210 = 147 - 12/210 = 135/210
  5. After reducing the fraction, the answer is 9/14

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