How is 10% expressed as a decimal?

To express a percentage as a decimal, you divide the percentage by 100. In this case, 10% can be calculated as follows:

10% = 10 ÷ 100 = 0.1

This conversion is based on the concept that the term "percent" literally means "per hundred." Therefore, 10% is equivalent to 10 out of 100, which simplifies to 0.1 when expressed in decimal form. Understanding this conversion is crucial, as it forms the basis for various mathematical and financial calculations.