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Multiply 21/42 with 40/81

This multiplication involving fractions can also be rephrased as "What is 21/42 of 40/81?"

21/42 × 40/81 is 20/81.

Steps for multiplying fractions

  1. Simply multiply the numerators and denominators separately:
  2. 21/42 × 40/81 = 21 × 40/42 × 81 = 840/3402
  3. After reducing the fraction, the answer is 20/81

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