Percentage analyses, ratios, turnovers, and other measures of financial position and operating results are select one: a. a substitute for sound judgment. b. useful analytical measures. c. enough information for analysis, industry information is not needed. d. unnecessary for analysis, but reaction is better.

Percentage analysis, ratios, turnovers, and other measures of financial position and operating results are useful analytical measures. 
Analytical measures are useful in assessing solvency and profitability of a business. Type of analytical measures used depends on; the size of the firm or business, the capital structure f the business, the type of business activity undertaken. They are useful for evaluating the financial results of a business and the performance of management.