15 is 30% of what number?
7 is what percent of 105?
10% of what number is 14?
what percent of 32 is 4?
and finally.. 1% of what number is 11?

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c