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Subtract 70/45 from 28/20

1st number: 1 8/20, 2nd number: 1 25/45

28/20 - 70/45 is -7/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 45 is 180
  2. For the 1st fraction, since 20 × 9 = 180,
    28/20 = 28 × 9/20 × 9 = 252/180
  3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
    70/45 = 70 × 4/45 × 4 = 280/180
  4. Subtract the two fractions:
    252/180 - 280/180 = 252 - 280/180 = -28/180
  5. After reducing the fraction, the answer is -7/45

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