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Subtract 63/8 from 20/5

1st number: 4 0/5, 2nd number: 7 7/8

20/5 - 63/8 is -31/8.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 8 is 40

    Next, find the equivalent fraction of both fractional numbers with denominator 40
  2. For the 1st fraction, since 5 × 8 = 40,
    20/5 = 20 × 8/5 × 8 = 160/40
  3. Likewise, for the 2nd fraction, since 8 × 5 = 40,
    63/8 = 63 × 5/8 × 5 = 315/40
  4. Subtract the two like fractions:
    160/40 - 315/40 = 160 - 315/40 = -155/40
  5. After reducing the fraction, the answer is -31/8

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