To answer this question, let x be the unknown number. From the given, the product of the number, x, and the decimal equivalent of the given percentage, 76.8%, is equal to 40.32. Mathematically, (0.768)(x) = 40.32 The value of x from the equation is 52.5.
You would first put 168 over 4 and simplify to get 42 over 1. Then you would divide 504 by 42 to get 12. You would have to drive 12 hours to get 504 miles.