91Ó°ÊÓ

In the following exercises, solve the proportion problem. Kelly leaves her home in Seattle to drive to Spokane, a distance of 280 miles. After 2 hours, she has gone 152 miles. At that rate, how long will the whole drive take?

In the following exercises, translate to a proportion. What number is 75\(\%\) of 920\(?\)

In the following exercises, translate to a proportion. What percent of 180 is 220\(?\)

In the following exercises, translate and solve using proportions. 22\(\%\) of 74 is what number?

Mixing a concentrate Sam bought a large bottle of concentrated cleaning solution at the warehouse store. He must mix the concentrate with water to make a solution for washing his windows. The directions tell him to mix 3 ounces of concentrate with 5 ounces of water. If he puts 12 ounces of concentrate in a bucket, how many ounces of water should he add? How many ounces of the solution will he have altogether?

To solve "what number is \(45 \%\) of \(350 "\) do you prefer to use an equation like you did in the section on Decimal Operations or a proportion like you did in this section? Explain your reason.

In the following exercises, write as a ratio and then as a percent. 9 out of every 100 nurses are men.

In the following exercises, convert each percent to (a) a simplified fraction and (b) a decimal. When a die is tossed, the probability it will land with an even number of dots on the top side is 50\(\% .\)

In the following exercises, convert each percent to (a) a simplified fraction and (b) a decimal. A couple plans to have three children. The probability they will all be girls is 12.5\(\%\) .

In the following exercises, translate and solve. 120\(\%\) of 55\(\quad\) is what number?