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Subtract 75/10 from 20/42

1st number: 20/42, 2nd number: 7 5/10

20/42 - 75/10 is -295/42.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 10 is 210
  2. For the 1st fraction, since 42 × 5 = 210,
    20/42 = 20 × 5/42 × 5 = 100/210
  3. Likewise, for the 2nd fraction, since 10 × 21 = 210,
    75/10 = 75 × 21/10 × 21 = 1575/210
  4. Subtract the two fractions:
    100/210 - 1575/210 = 100 - 1575/210 = -1475/210
  5. After reducing the fraction, the answer is -295/42

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