Officer Aptitude Rating (OAR) Practice Test 2025 – Comprehensive All-In-One Guide to Exam Success!

Decimal fractions represent a part of a whole. When we express a number in decimal form, we are essentially indicating how many parts of a whole we have. For example, the decimal 0.75 represents 75 parts out of 100, or three-quarters of a whole. This concept is fundamental in understanding how decimals function as extensions of whole numbers, allowing us to express values that fall between those whole numbers.

The other choices, while related to numbers, do not accurately describe the specific role of decimal fractions. The notion of a sum of whole numbers pertains to addition rather than the representation of values. A sequence of whole numbers implies an ordered list, which does not capture the fractional aspect. Lastly, a ratio of integers describes a comparison between two whole numbers rather than illustrating the part-whole relationship that decimals embody.