In an uphill warning road sign, the percentage of [[$ 7 \% $]] describes the steepness of the hill (i.e., over the course of [[$ 100 $]] meters the road ascends by 7 [[$ 7 $]] m). What is the percentage steepness of the hill if

a) a [[$ 200 $]] m stretch of road has an ascent of [[$ 30 $]] m?



Answer: The steepness of the hill is [[$ \% $]].

b) a [[$ 150 $]] m stretch of road has an ascent of [[$ 18 $]] m?



Answer: The steepness of the hill is [[$ \% $]].

c) a [[$ 500 $]] m stretch of road has an ascent of [[$ 500 $]] m?



Answer: The steepness of the hill is [[$ \% $]].