Ratios Rates and Percent

On Friday, Biannka spent 25% of her money. She had $550.00 total in her bank account. How much money did she spend on Friday? 
*Which choices shows the correct way to set up this question?*

• 25⁄550=^x⁄100

• 550⁄100=25⁄_x

• 100⁄25=^x⁄550

• ^x⁄550=25⁄100

Rafael is painting his house. He has 800 square feet of walls in his house. He plans to paint 216 square feet of the walls. What percent of the walls in his house will he paint?
*Which choices shows the correct equation found after the proportion?*

• 800x=21,600

• 21,600x=800

• 216x=80,000

• 80,000x=216

There were 415 people at the soccer game last week. 15% of those people were parents. Which is closest to the number of parents at the concert? Which choices shows the correct way to solve this question?

• ^x⁄100=15⁄415

• 100⁄x=15⁄415

• ^x⁄415=15⁄100

• 415⁄100=15⁄_x

Shelby purchased a coat for $101.50 that was regularly priced at $145, not including tax. What percent did Shelby save by purchasing that coat on sale?
*Is this a percent increase, percent decrease, sales tax, or income tax?*

• sales tax

• percent increase

• income tax

• percent decrease

An 8-ounce cup of gourmet coffee costs $4.50. If the unit price remain the same, how much would 32 ounces of coffee cost?
*Most specifically, is this a rate, unit rate, WON chart, or percent bar?*

• percent bar

• rate

• WON chart

• unit rate

Holly and her 2 best friends go to dinner. their total bill is $31.84. They use a coupon for 15% off the total. If they split the bill evenly, how much money will each person owe, to the nearest cent?
*how would i go about solving this?*

• multiply the total bill by two and add 15

• calculate a 15% increase and divide the new total by 2

• calculate a 15% decrease and divide the new total by 2

• find 15% of the total bill and divide it by 2

Last year, the seventh grade enrollment at Main middle school was 612 students. This year, the enrollment dropped to 489 students. Which best reflects the percent change in enrollment at Main Middle School from last year to this year?
*Is this a percent increase, percent decrease, percent change, or discount?*

• percent decrease

• percent change

• discount

• percent increase

A store decreases the price of an item from $120 to $96. What was the percent decrease?
*This would be commonly called what?*

• discount

• sales tax

• income tax

• fees

Simplify the ratio into a unit rate: 14⁄35
*How do we make this a unit rate?*

• divide numerator and denominator by the denominator

• divide the numerator and denominator by the numerator

• multiply the numerator and denominator by the numerator

• multiply the numerator and denominator by the denominator

Elijah earn $200 for 8 hours of work. What is the unit rate (in dollars per hour)?
*What does it mean by unit rate?*

• hours per dollar

• simplify 8⁄200

• multiply 8 by 200

• dollars per hour