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# Slope Ratio

Suppose that a highway rises a distance of 215 feet in a horizontal distance of 2640 feet. Express the grade of the highway to the nearest tenth of a percent.

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 Nov 09, 2010 Rating VISHAL by: Anonymous GOOD ONE

 Aug 16, 2010 Rating Slope Ratio by: Karin For this problem, we must remember that slope is: rise/run. Therefore the ratio is: 215/2640 Now we must divide in order to change this ratio (fraction) to a decimal. Then we can change a decimal to a percent. 215/2640 = .0814 Now to change the decimal to a percent, you must multiply the decimal by 100 or move the decimal point two places to the right. .0814 * 100 = 8.14 Therefore, the grade of the hill is 8.1%. I hope this helps, Karin

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