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Subtract 7/70 from 4/21

4/21 - 7/70 is 19/210.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 70 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 70 × 3 = 210,
    7/70 = 7 × 3/70 × 3 = 21/210
  4. Subtract the two fractions:
    40/210 - 21/210 = 40 - 21/210 = 19/210

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