-17/15
Find a common denominator, and multiply the numerator by the same factor. Don't forget that adding a negative is really subtracting.
Whoever travels at the faster rate will arrive first.
We need to find and compare two unit rates:
11 miles
------------ = 0.917 miles per minute
12 min
26 miles
--------------- = 1.083 miles per min
24 minutes
It's obvious that Marisol is driving faster. She will thus be first to arrive at the concert.