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Express 3.999 as a percent

3.999 is equivalent to 399.9%

Steps to convert decimal into percentage

  1. Multiply both numerator and denominator by 100. We do this to find an equivalent fraction having 100 as the denominator.
    3.999 × 100/100
  2. = (3.999 × 100) × 1/100 = 399.9/100
  3. Write in percentage notation: 399.9%

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