Ivan drove 737 miles in 11 hours. At the same rate, how long would it take him to drive 603 miles?

It will take him 9 hours to drive 603 miles.

737 miles per 11 hours

737:11 is the ratio of distance to time

so the other ratio we have is

603:x, x is missing

we assume the ratios to be equal so

737:11=603:x

fractionify

737/11=603/x

multiply both sides by 11x

737x=6633

divide both sides by 737

x=9

answer is 9 houurs