A ___ is a measurement that compares a number to 100.

• A. Ratio
• B. Percent
• C. Proportion
• D. Fraction

Answer: (B)

The correct term that defines a measurement comparing a number to 100 is "percent." A percent represents a part per hundred, which means it expresses the relative size of a quantity in relation to a whole that is divided into 100 equal parts. This concept is commonly used in various fields including finance, statistics, and everyday calculations, making it a fundamental mathematical concept.

While other concepts like ratios, proportions, and fractions may deal with comparisons and parts of whole numbers, they do not specifically frame their comparisons in terms of a base of 100. A ratio compares two quantities, a proportion states that two ratios are equal, and a fraction represents a part of a whole but is not confined to a base of 100 like a percent is. Thus, the definition and application of percent distinctly highlight its role in quantifying values in a clear, understandable manner relative to a universal scale of 100.