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Subtract 1/30 from 21/20

1st number: 1 1/20, 2nd number: 1/30

21/20 - 1/30 is 61/60.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 30 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 20 × 3 = 60,
    21/20 = 21 × 3/20 × 3 = 63/60
  3. Likewise, for the 2nd fraction, since 30 × 2 = 60,
    1/30 = 1 × 2/30 × 2 = 2/60
  4. Subtract the two like fractions:
    63/60 - 2/60 = 63 - 2/60 = 61/60
  5. In mixed form: 11/60

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