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Subtract 21/45 from 2/6

2/6 - 21/45 is -2/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 6 and 45 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 6 × 15 = 90,
    2/6 = 2 × 15/6 × 15 = 30/90
  3. Likewise, for the 2nd fraction, since 45 × 2 = 90,
    21/45 = 21 × 2/45 × 2 = 42/90
  4. Subtract the two like fractions:
    30/90 - 42/90 = 30 - 42/90 = -12/90
  5. After reducing the fraction, the answer is -2/15

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