How do you convert a percentage to a decimal?

To convert a percentage to a decimal, you need to divide the percentage value by 100. This is because a percentage is defined as a part out of 100. For instance, if you have 75%, dividing by 100 converts it to 0.75. This process shifts the decimal point two places to the left, which is essential in accurately representing the value in decimal form.

In contrast, multiplying by 100 would incorrectly turn the decimal into a percentage, while adding a zero or subtracting from 100 does not relate to the conversion process at all. Understanding this basic operation is crucial for performing calculations involving percentages and decimals accurately in various mathematical contexts.