1. The company replaces one-third of its fleet every year.
The fleet consists of 75 cars.
One-third of 75 is 75 / 3 = 25.
So, it replaces 25 cars every year.
2. In terms of full games, he gets (9 games) of playing time.
Explanation: He starts 12 games. He gets 3/4 of each game. So, 12*3/4=9
3. Jack grows vegetables on 4/3 acre. Sam grows vegetable on 5/4 acre. Which is bigger, 4/3 or 5/4?
4/3 is bigger.
So, Jack has the biggest area of vegetables.