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Subtract 3/6 from 21/80

21/80 - 3/6 is -19/80.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 6 is 240

    Next, find the equivalent fraction of both fractional numbers with denominator 240
  2. For the 1st fraction, since 80 × 3 = 240,
    21/80 = 21 × 3/80 × 3 = 63/240
  3. Likewise, for the 2nd fraction, since 6 × 40 = 240,
    3/6 = 3 × 40/6 × 40 = 120/240
  4. Subtract the two like fractions:
    63/240 - 120/240 = 63 - 120/240 = -57/240
  5. After reducing the fraction, the answer is -19/80

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