If I drove 252 miles and that was 35% of the distance, how many miles is my trip total?

720 miles

Why?

Let x represent the number of miles your trip is in total.

Therefore, this is your expression;

0.35x = 252

35 percent of your total miles is how much you've driven so far, 252 miles.

Now, switch the equation around so that x is by itself.

x = 252/0.35

x = 720

Therefore, the total number of miles your trip is is 720 miles.

Check:

0.35 (720) = 252