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Subtract 2/9 from 21/20

1st number: 1 1/20, 2nd number: 2/9

21/20 - 2/9 is 149/180.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 9 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    21/20 = 21 × 9/20 × 9 = 189/180
  3. Likewise, for the 2nd fraction, since 9 × 20 = 180,
    2/9 = 2 × 20/9 × 20 = 40/180
  4. Subtract the two like fractions:
    189/180 - 40/180 = 189 - 40/180 = 149/180

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