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Subtract 35/90 from 18/21

18/21 - 35/90 is 59/126.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 21 × 30 = 630,
    18/21 = 18 × 30/21 × 30 = 540/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    35/90 = 35 × 7/90 × 7 = 245/630
  4. Subtract the two like fractions:
    540/630 - 245/630 = 540 - 245/630 = 295/630
  5. After reducing the fraction, the answer is 59/126

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