. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Comparing and scaling : Ratio, proportion, and percent"@en . . . . . . . "Comparing and scaling : ratio, proportion, and percent" . . "Comparing and scaling : ratio, proportion, and percent"@en . "Comparing and scaling ratio, proportion, and percent"@en . . . . . . . . . . . . . . . .