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Subtract 80/49 from 20/28

1st number: 20/28, 2nd number: 1 31/49

20/28 - 80/49 is -45/49.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 49 is 196

    Next, find the equivalent fraction of both fractional numbers with denominator 196
  2. For the 1st fraction, since 28 × 7 = 196,
    20/28 = 20 × 7/28 × 7 = 140/196
  3. Likewise, for the 2nd fraction, since 49 × 4 = 196,
    80/49 = 80 × 4/49 × 4 = 320/196
  4. Subtract the two like fractions:
    140/196 - 320/196 = 140 - 320/196 = -180/196
  5. After reducing the fraction, the answer is -45/49

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