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Subtract 45/20 from 20/70

1st number: 20/70, 2nd number: 2 5/20

20/70 - 45/20 is -55/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 20 is 140
  2. For the 1st fraction, since 70 × 2 = 140,
    20/70 = 20 × 2/70 × 2 = 40/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    45/20 = 45 × 7/20 × 7 = 315/140
  4. Subtract the two fractions:
    40/140 - 315/140 = 40 - 315/140 = -275/140
  5. After reducing the fraction, the answer is -55/28

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