Ratios and Proportions Percent Word Problems

A proportion is when....

• two ratios are set to be equal

• one ratio is bigger than the other

• the ratio cannot be solved

• we find the unit price

How can we identify the unknown in a proportion? (Check all the right answers)

• using a variable, like x or y

• putting a box in the place of the unknown

• putting a question mark in place of the unknown

• putting the number 10 to hold the place

Solve the proportion: If there are 10 students in one class, there would be _________ students in 5 classes.

• 5

• 50

• 10

• 55

Solve the proportion, a car that drives 100km / hour, will travel _________ km in 3 hours.

• 3

• 100

• 150

• 300

• A

• B

• C

• D

While preparing for a triathlon, Janecia swims 8 minutes for every 20 minutes she bikes.  If she swims 72 minutes, how long does she bike for?

• 180 minutes

• 144 minutes

• 92 minutes

• 80 minutes

A movie theater randomly samples the types of admission tickets sold on Friday in the afternoon and the evening. If 400 tickets are sold on a Friday afternoon, use your inference and proportional reasoning skills to determine how many of those 400 tickets would be adult tickets. Type your numerical answer only.

Tags

CCSS.Math.Content.7.RP.A.3

Allison can bake 4 cakes in one day.  How many days would it take to bake 24 cakes? Which of the following proportions can be used to solve this problem?

Once a proportion is set up, the first step is to.....
(Here is an example: \(\frac{x}{4}=\ \frac{12}{24}\) )

• multiply on the diagonal

• multiply the numbers in the second fraction

• divide each number, one by one

• add on the diagonal

Solve the following proportion (you can use a calculator if you need to). What is x equal to?

• 270

• 0.25

• 4

• 190