45% as a Fraction and a Decimal

Convert 45% to a fraction in simplest form and to a decimal.

45% as a fraction
9/20
45% as a decimal
0.45
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How it works

“Percent” means “out of 100”, so 45% is 45/100.

  • As a fraction: 45/100 = 45/100 = 9/20 after dividing by the greatest common factor.
  • As a decimal: 45 ÷ 100 = 0.45.

Work with percentages

The percentage calculator finds a percent of a number, percentage change and more.

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Frequently asked questions

What is 45% as a fraction?+

45% as a fraction is 9/20 in simplest form. A percent means "out of 100", so 45% = 45/100, which reduces to 9/20.

What is 45% as a decimal?+

45% as a decimal is 0.45. To convert a percent to a decimal, divide by 100 (move the decimal point two places left).