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Subtract 45/70 from 20/30

20/30 - 45/70 is 1/42.

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,
    20/30 = 20 × 7/30 × 7 = 140/210
  3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
    45/70 = 45 × 3/70 × 3 = 135/210
  4. Subtract the two like fractions:
    140/210 - 135/210 = 140 - 135/210 = 5/210
  5. After reducing the fraction, the answer is 1/42

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