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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
Approx 2 minutes
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A telephone marketer earns a $13%$13% commission on their sales each week. In one week, their sales amounted to $\$970$$970.

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

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

Outcomes

6.RP.A.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.A.3.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.

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