Real World Percent Problems

Multiple Choice

What does the word percent mean?

• A hundredth of a quantity

• A ratio that compares two numbers

• An amount compared to 10

• A part of a whole

Open Ended

With a partner

What are all the ways you can represent one percent?

Open Ended

With a partner

What are all the ways you can represent 25 percent?

Multiple Select

Which of the options below represent 87 percent?

• 8.7
• 0.087
• 87%

• 87/100

• 0.87

What does this data tell me?

​____% of you have the prerequisite knowledge for this lesson

However, no worries if you got some questions wrong. This is a safe space and we will work for 100% by the end of this period

So, let's turn and talk about this

Why do we use percentages in the real world?

Today, we are reviewing how to SOLVE real-world percent problems

NY-7.RP.3 Use proportional relationships to solve multistep ratio and percent problems.

Note: Examples of percent problems include: simple interest, tax, markups and markdowns, gratuities and commissions, fees, percent increase and decrease, and percent error.

Let's Start With Simple Interest

Ashley invested $140. She earned a simple interest of 6% per year on the initial investment. If no money was added or removed from the investment, what was the amount of interest Ashley received at the end of two years?

Multiple Choice

You invest $5,000 in a bank for 2 years at a 3% interest rate. What is the interest you have earned after this time?

• $10,300

• $300

• $5,023

• $150

Let's go to tax

A store purchased a TV for $120.00 and sold it to a customer for 50% more than the purchase price. The customer was charged a 7% tax when the TV was sold. What was the customer's total cost for the TV?

Multiple Choice

Rick bought 3 shirts for $18 each, 2 pair of socks for $4.00 a pair, and a pair of slacks for $48.00. The sales tax rate is 8%. How much did he pay?

• $75.60

• $114.48

• $111.08

• $118.80

Let's go to percent increase/decrease

A company manufactures water bottles. The list below describes the number of water bottles manufactured in three months:

February: 4,100 water bottles
March: 7% more water bottles than in February
April: 500 more water bottles than in March

What is the percent increase, to the nearest percent, in the number of water bottles the company manufactured from February to April?

Multiple Choice

The Panthers won 16 games last year. This year, the Panthers won 20 games. What i the percent increase in the number of games the Panthers won from last year to this year?

• 80%

• 20%

• 25%

• 125%