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Name:___________________
Math 7 Unit 3c PRACTICE Embedded Assessment
Percents and Proportions: Socializing and Selling
Facebook and eBay are two popular Web services with many users. Facebook is a social media
site where members connect with others. eBay is a marketing site where people buy and sell
merchandise.
There were 845 million Facebook users at the end of 2011, which was up from 608 million users
at the end of 2010.
1. What percent is 608 million of 845 million? (2 pts)
2. What is the percent increase in users between 2010 and 2011? (2 pts)
3. 51.5% of all users access Facebook on mobile devices. How many users used mobile
devices in 2011? (2 pts)
4. Facebook is now used by one in every 13 people on Earth. What percent is this? (2 pts)
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Name:___________________
eBay allows people to sell any item for what others will pay for it.
5. The price of a digital camera sold in stores is $129. It is sold on eBay for $65. What is the
percent decrease from the store’s price to the online price? (2 pts)
6. What percent discount would this be in a store? (2 pts)
Some people have others sell items for them on eBay and then give them a part of the profit as a
commission.
7. One forklift sells every 4 hours on eBay. If a forklift sells for $2,999 and the seller
receives a 12% commission, how much does the seller receive for the sale? (3 pts)
8. One family spent $2,000 to start an online business selling goods. They now make
$1,240,000 each year. If they invested half of their yearly earnings in a savings account
earning 4% simple interest, how much would the account have in it at the end of 5 years?
(3 pts)
9. Sales tax is added to the price of items sold on eBay. If someone in Arizona buys an item
online for $22.50 and the state sales tax rate is 6.6%, what is the final selling price?
(3 pts)