How do you calculate percentage change

hope this helps :)

Calculating Percentage Change Step-by-Step  

To calculate a percentage increase, first work out the difference (increase) between the two numbers you are comparing:  

Increase = New Number - Original Number  

Next, divide the increase by the original number and multiply the answer by 100:  

% increase = Increase ÷ Original Number × 100.  

If the answer is a negative number, that means the percentage change is a decrease.

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

∡ eia and ∡ kij are congruent

step-by-step explanation: