Posted by **Joyce** on Monday, January 31, 2011 at 4:54pm.

A roof rises 1.4 feet vertically and 11.8 feet horizontally. What is the grade of the roof? The grade of the roof is _____% how do I begin to find the answer to this

- algebra -
**MathMate**, Monday, January 31, 2011 at 7:05pm
Grade is rise/run, or difference in elevation divided by the horizontal distance.

If the roof rises 1.4' vertically over a horizontal distance of 11.8', the grade is 1.4/11.8=0.1186, or in percents, then multiply the above fraction by 100 to get

1.4/11.8*100=11.86%.

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