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Multiply 9/80 with 21/45

This multiplication involving fractions can also be rephrased as "What is 9/80 of 21/45?"

9/80 × 21/45 is 21/400.

Steps for multiplying fractions

  1. Simply multiply the numerators and denominators separately:
  2. 9/80 × 21/45 = 9 × 21/80 × 45 = 189/3600
  3. After reducing the fraction, the answer is 21/400

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