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Subtract 18/90 from 20/14

1st number: 1 6/14, 2nd number: 18/90

20/14 - 18/90 is 43/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 14 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 14 × 45 = 630,
    20/14 = 20 × 45/14 × 45 = 900/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    18/90 = 18 × 7/90 × 7 = 126/630
  4. Subtract the two like fractions:
    900/630 - 126/630 = 900 - 126/630 = 774/630
  5. After reducing the fraction, the answer is 43/35
  6. In mixed form: 18/35

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