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Subtract 72/10 from 35/42

1st number: 35/42, 2nd number: 7 2/10

35/42 - 72/10 is -191/30.

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,
    35/42 = 35 × 5/42 × 5 = 175/210
  3. Likewise, for the 2nd fraction, since 10 × 21 = 210,
    72/10 = 72 × 21/10 × 21 = 1512/210
  4. Subtract the two fractions:
    175/210 - 1512/210 = 175 - 1512/210 = -1337/210
  5. After reducing the fraction, the answer is -191/30

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