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Subtract 40/42 from 10/5

1st number: 2 0/5, 2nd number: 40/42

10/5 - 40/42 is 22/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 42 is 210
  2. For the 1st fraction, since 5 × 42 = 210,
    10/5 = 10 × 42/5 × 42 = 420/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    40/42 = 40 × 5/42 × 5 = 200/210
  4. Subtract the two fractions:
    420/210 - 200/210 = 420 - 200/210 = 220/210
  5. After reducing the fraction, the answer is 22/21
  6. In mixed form: 11/21

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