Irene R. answered 12/17/20
BS in Mechanical Engineering and Certified math teacher for 13 years
Hi Jade,
You can use ratios to solve this problem. The ratio of trucks to cars is:
2 trucks
7 cars
For 63 cars:
2 trucks = x
7 cars 63 cars
2 trucks • 9 = 18 trucks
7 cars • 9 63 cars
However, the way this problem is worded, it may be asking you to say how many cars are trucks - in this case , that would be zero. Cars are not trucks. I assume that this was not the intent of the problem though.