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Subtract 90/42 from 4/10

1st number: 4/10, 2nd number: 2 6/42

4/10 - 90/42 is -61/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 42 is 210
  2. For the 1st fraction, since 10 × 21 = 210,
    4/10 = 4 × 21/10 × 21 = 84/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    90/42 = 90 × 5/42 × 5 = 450/210
  4. Subtract the two fractions:
    84/210 - 450/210 = 84 - 450/210 = -366/210
  5. After reducing the fraction, the answer is -61/35

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