Heather drove 864 miles in 12 hours. At the same rate, how long would it take her to drive 576 miles?

Question

Please help me!?!??! I Really need help so please help me! thanks you if you help me

Answer 1

8 hours

576/684 = 2/3. 2/3 of 12 = 8 hours

x/12 = 576/864

cross multiply

864x = 12(576) = 6912

divide both sides by 864

x = 6912/864 = 8 hours to drive 576 miles