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Subtract 7/20 from 18/8

1st number: 2 2/8, 2nd number: 7/20

18/8 - 7/20 is 19/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 20 is 40

    Next, find the equivalent fraction of both fractional numbers with denominator 40
  2. For the 1st fraction, since 8 × 5 = 40,
    18/8 = 18 × 5/8 × 5 = 90/40
  3. Likewise, for the 2nd fraction, since 20 × 2 = 40,
    7/20 = 7 × 2/20 × 2 = 14/40
  4. Subtract the two like fractions:
    90/40 - 14/40 = 90 - 14/40 = 76/40
  5. After reducing the fraction, the answer is 19/10
  6. In mixed form: 19/10

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