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3.06 Proportional reasoning with percents

Interactive practice questions

A salesperson earns a $13%$13% commission on their sales each week. In one week, their sales amounted to $\$640$$640.

a

First, find $10%$10% of their total sales.

b

Now find $3%$3% of their total sales. Leave your answer to two decimal places.

c

Hence, find the total commission they made this week. Write your answer to two decimal places.

Medium
2min

A telephone marketer earns a $13%$13% commission on their sales each week. In one week, their sales amounted to $\$970$$970.

Medium
2min

On Monday, Derek had a full tank of $40$40 Liters gasoline. During the week Derek used $55%$55% of the gasoline.

Medium
1min

We want to find $45%$45% of $5$5 hours.

Medium
1min
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Outcomes

6.RP.3

Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning about tables of equivalent ratios, tape diagrams, double number line diagrams, or equations.

6.RP.3c

c. Find a percent of a quantity as a rate per 100 (e.g., 30% of a quantity means 30/100 times the quantity); solve problems involving finding the whole given a part and the percent.

6.RP.A.3.e

Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning about tables of equivalent ratios, tape diagrams, double number line diagrams, or equations e. Solve problems that relate the mass of an object to its volume.

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