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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

NC.6.RP.3

Use ratio reasoning with equivalent whole-number ratios to solve real-world and mathematical problems by:• Creating and using a table to compare ratios.• Finding missing values in the tables. • Using a unit ratio. • Converting and manipulating measurements using given ratios. • Plotting the pairs of values on the coordinate plane.

NC.6.RP.4

Use ratio reasoning to solve real-world and mathematical problems with percents by: • Understanding and finding a percent of a quantity as a ratio per 100. • Using equivalent ratios, such as benchmark percents (50%, 25%, 10%, 5%, 1%), to determine a part of any given quantity. • Finding the whole, given a part and the percent.

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