Name
Block
Key Terms to Know
1. Ratio
2. Equivalent ratios
3. Proportion
4. Commission
5. Discount
6. Sales price
Key Concepts to Know

A ratio can be expressed in one of 3 different ways…..
____________________, ____________________, and ____________________

Percent problems involve 3 quantities
____________________, ____________________, and ____________________
While it would be impossible to go over every potential example, let’s look at some possible
problems.
Ex. 1
Ratios, Proportions, and Percents
In Kayla’s garden, she has 12 tulips and 16 daffodils. Steve, who also has a garden that is
proportional to Kayla’s has 30 tulips. How many daffodils does Steve have?
Ex. 2
Ratios, Proportions, and Percents
Which of the following is NOT equivalent to the others?
a) 3 : 4 = 12 : 16
b)
c)
17 : 25 = 51 : 100
d) 16 to 24 = 56 to 84
Ex. 3
Ratios, Proportions, and Percents
I have a bag of red and yellow jellybeans. The ratio of the red jellybeans to the yellow
jellybeans is 3 : 5.
a) If there are 64 belly beans are in the bag, how many of them are red?
b) If there are 24 jellybeans in the bag, how many of them are yellow?
c) If there are 42 red jellybeans in the bag, how many jellybeans are there in total?
Ex. 4
Ratios, Proportions, and Percents
On the weekends, Mr. Sullivan works at a computer store. He makes a commission of 7% on all
of his sales. Last week, he made $2,450.
a) How much commission did he earn last week?
b) What was his final take-home earnings?
Ex. 5
Ratios, Proportions, and Percents
Last year, Mr. Abraham bought a car for $21,000. This year, the car is worth $18,000. What is
the percent of decrease in the value of his car?
Ex. 6
Ratios, Proportions, and Percents
Mr. Partlow bought a pair of jeans over the weekend for $25. This was 62.5% of the original
price. What was the original price of the jeans?
Ex. 7
Ratios, Proportions, and Percents
Mike needs go to the bank to take out a loan. He wants $4,000 for one year. However, the
bank says that he will have to pay an additional 8% of interest.
a) How much total will Mike owe the bank?
b) If he is allowed to make 12 equal payments, how much will each payment be?