Proportional reasoning

There are 9 students in a classroom that play football, this is 37.5% of the class. How many students are in the class?

Set up a proportion to help you solve this problem.

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Pacino worked 8 hours out of the day. What percent of the day did he work?

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26 is 5% of what number?

• 1.3
• 2.5
• 25.95
• 520

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2.  Cann Electronics has a sale, and all electronics are on sale for 20% off. If a computer is on sale for $680, what was the original price?

• $544
• $816
• $725
• $850

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7.  Amanda increased the amount of protein she eats every day from 48 g to 54 g. By what percentage did Amanda increase the amount of protein she eats?

• 11.1%
• 88.9%
• 112.5%
• 12.5%

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23% of all car accidents are related to texting while driving. If there were 138 accidents due to texting, how many total accidents occurred?

• 16
• 32
• 300
• 600

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You spend about 4 hours in math class each week. What percent of the total time in a week is this? (Hint: 168 hours per week)

• 2,4%
• 4%
• 16,7%
• 57.1%

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Earl runs 75 meters in 30 seconds. How many meters does Earl run per second?

• 5.2

• 6:6

• 4.6

• 2.5

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Danny charges $35 for 3 hours of swimming lessons. Martin charges $24 for 2 hours of swimming lessons. Who offers a better deal?

• Danny

• Martin

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A ________is a ratio that compares a number to 100. The symbol % is used to show a ________.

• ratio

• percent

• proportion

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