1. A car can travel 45 miles on 2 gallons of gasoline. How far can it travel on 5.6 gallons?

2. In a mixture of raisins and dates, the ratio by weight of raisins to dates is 7 to 3. How many pounds of raisins will there be in 7 pounds of this mixture?

3. If 5 is x% of 15, then what is x% of 60?

4. If a and b are positive numbers, what is equivalent to a% of 5b?

5. If 20% of **n** is equal to 40, what is **n**?

6. The price of a T-shirt was $20. It was first increased by 20%. They did not sell well the shop owner decreased the price by 20%. What is the new price of the T-shirt?

7. George bought a car at $5000 and sold it at $5500. What benefit, in percent, did he make?

8. The price of a pair of trousers was decreased by 22% to $30. What was the original price of the trousers?

9. The price of an item changed from $120 to $100. Then later the price decreased again from $100 to $80. Which of the two decreases was larger in percentage term?

10. The price of an item decreased by 20% to $200. Then later the price decreased again from $200 to $150. What is the percent of decrease from the original price to the final price of $150?

11. If t is 40 percent greater than p, and p is 40 percent less than 600, what is the value of t − p?

12. A beaker contains 15 grams of a water and salt solution that is 20% salt. If x more grams of water are added to the solution, which of the following expresses the percentage of salt in the new solution?