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Subtract 18/21 from 63/20

1st number: 3 3/20, 2nd number: 18/21

63/20 - 18/21 is 321/140.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 21 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 20 × 21 = 420,
    63/20 = 63 × 21/20 × 21 = 1323/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    18/21 = 18 × 20/21 × 20 = 360/420
  4. Subtract the two like fractions:
    1323/420 - 360/420 = 1323 - 360/420 = 963/420
  5. After reducing the fraction, the answer is 321/140
  6. In mixed form: 241/140

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