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Subtract 42/10 from 2/5

1st number: 2/5, 2nd number: 4 2/10

2/5 - 42/10 is -19/5.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 10 is 10

    Next, find the equivalent fraction of both fractional numbers with denominator 10
  2. For the 1st fraction, since 5 × 2 = 10,
    2/5 = 2 × 2/5 × 2 = 4/10
  3. Likewise, for the 2nd fraction, since 10 × 1 = 10,
    42/10 = 42 × 1/10 × 1 = 42/10
  4. Subtract the two like fractions:
    4/10 - 42/10 = 4 - 42/10 = -38/10
  5. After reducing the fraction, the answer is -19/5

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