What is a decimal fraction?

A decimal fraction is defined as a fraction whose denominator is a power of 10, which means it can be expressed in the form of 1, 10, 100, 1000, etc. This type of fraction can be represented as a decimal number, making it easy to convert between fraction and decimal forms. For instance, the fraction 3/10 can be represented in decimal form as 0.3. The connection between fractional and decimal representations is crucial in many mathematical contexts, particularly in calculations involving percentages and financial figures.

The other options do not accurately capture the definition of a decimal fraction. While a fraction with a numerator of zero represents a value of zero, it does not pertain to the characteristics of a decimal fraction. A number less than one, while it may include decimal fractions, does not adequately define them since decimal fractions can also represent numbers greater than one when expressed in the correct form (e.g., 15/10 equals 1.5). Lastly, a fraction whose numerator is a power of 10 does not meet the definition, as it does not necessarily relate to the structure of decimal fractions, which focus specifically on the denominator being a power of 10.