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Subtract 2/20 from 21/30

21/30 - 2/20 is 3/5.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 30 × 2 = 60,
    21/30 = 21 × 2/30 × 2 = 42/60
  3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
    2/20 = 2 × 3/20 × 3 = 6/60
  4. Subtract the two like fractions:
    42/60 - 6/60 = 42 - 6/60 = 36/60
  5. After reducing the fraction, the answer is 3/5

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