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Subtract 75/10 from 70/21

1st number: 3 7/21, 2nd number: 7 5/10

70/21 - 75/10 is -25/6.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 10 is 210
  2. For the 1st fraction, since 21 × 10 = 210,
    70/21 = 70 × 10/21 × 10 = 700/210
  3. Likewise, for the 2nd fraction, since 10 × 21 = 210,
    75/10 = 75 × 21/10 × 21 = 1575/210
  4. Subtract the two fractions:
    700/210 - 1575/210 = 700 - 1575/210 = -875/210
  5. After reducing the fraction, the answer is -25/6

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