One lap around a parking lot is 3/10 mile. this represents 15% of the total distance gregory ran.

We represent the total distance that Gregory ran by x such that 15% of the distance traveled by Gregory is 3/10 mile. Mathematically,
                                  (0.15)(x) = 3/10
The value of x from the equation is 2. Thus, the answer to this item is 2 miles. 

put like terms together.orremember that the 45 becomes negative when moved to the other side.orthe minuses cancel out.