How do I change percents to decimals and fractions? How about decimals and fractions to percents?

Sometimes, basic math — such as changing decimals to percents and back again — can flummox even the most intelligent people. Here are a few pointers for the math-challenged.

To change decimals to percents:

  1. Move the decimal point two places to the right.

  2. Insert a percent sign.

    Example: .55 = 55%

To change percents to decimals:

  1. Eliminate the percent sign.

  2. Move the decimal point two places to the left (sometimes, adding zeros will be necessary).

    Example: 7% = .07

To change fractions to percents:

  1. Change the fraction to a decimal.

  2. Change the decimal to a percent.

    Example: 2/5 = .4 = 40%

To change percents to fractions:

  1. Drop the percent sign.

  2. Write over one hundred.

  3. Reduce if necessary.

    Example: 45% = 45/100 = 9/20