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Subtract 24/40 from 20/70

20/70 - 24/40 is -11/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 40 is 280
  2. For the 1st fraction, since 70 × 4 = 280,
    20/70 = 20 × 4/70 × 4 = 80/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    24/40 = 24 × 7/40 × 7 = 168/280
  4. Subtract the two fractions:
    80/280 - 168/280 = 80 - 168/280 = -88/280
  5. After reducing the fraction, the answer is -11/35

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