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Subtract 45/30 from 20/70

1st number: 20/70, 2nd number: 1 15/30

20/70 - 45/30 is -17/14.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 30 is 210
  2. For the 1st fraction, since 70 × 3 = 210,
    20/70 = 20 × 3/70 × 3 = 60/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    45/30 = 45 × 7/30 × 7 = 315/210
  4. Subtract the two fractions:
    60/210 - 315/210 = 60 - 315/210 = -255/210
  5. After reducing the fraction, the answer is -17/14

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