What is percent of change? 5 cups to 15 cups

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

At the county fair, the baxter family bought 6 hot dogs and 4 juice drinks for $12.90. the farley family bought 3 hot dogs and 4 juice drinks for $8.55. find the price of a hot dog and the price of a juice drink.

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?