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Reduce 21/4 to lowest terms

21/4 is already in the simplest form. It can be written as 5.25 in decimal form (rounded to 6 decimal places).

Steps to simplifying fractions

  1. Find the GCD (or HCF) of numerator and denominator
    GCD of 21 and 4 is 1
  2. Divide both the numerator and denominator by the GCD
    21 ÷ 1/4 ÷ 1
  3. Reduced fraction: 21/4
    Therefore, 21/4 simplified to lowest terms is 21/4.

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