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Subtract 4/8 from 2/5

2/5 - 4/8 is -1/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 8 is 40
  2. For the 1st fraction, since 5 × 8 = 40,
    2/5 = 2 × 8/5 × 8 = 16/40
  3. Likewise, for the 2nd fraction, since 8 × 5 = 40,
    4/8 = 4 × 5/8 × 5 = 20/40
  4. Subtract the two fractions:
    16/40 - 20/40 = 16 - 20/40 = -4/40
  5. After reducing the fraction, the answer is -1/10

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