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Subtract 21/45 from 2/3

2/3 - 21/45 is 1/5.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 3 and 45 is 45
  2. For the 1st fraction, since 3 × 15 = 45,
    2/3 = 2 × 15/3 × 15 = 30/45
  3. Likewise, for the 2nd fraction, since 45 × 1 = 45,
    21/45 = 21 × 1/45 × 1 = 21/45
  4. Subtract the two fractions:
    30/45 - 21/45 = 30 - 21/45 = 9/45
  5. After reducing the fraction, the answer is 1/5

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