05.08 Recalling Percent Change

unit 5

Recalling Percent Change

 Goal

You will identify percent increases or decreases, final amount calculations, and expressions using only multiplication to represent a percent increase or decrease. Then, apply that knowledge by answering questions. 

  Estimated completion time: 40 minutes

 Watch

We can write different expressions to calculate percent increase and decrease.

Suppose a new phone costs $360 and is on sale at 25% off the regular price. One way to calculate this is to first find 25% of 360, which is 90, and then subtract $90 from $360 to get a sale price of $270. These calculations can be recorded in this way:

Another way to represent this calculation is to notice that subtracting 25% of the cost is equivalent to finding 75% of the cost. Using the distributive property, we know that can be rewritten as , which is equal to .

 Apply

Click the Take the Quiz button to start the assignment.

You have unlimited attempts to achieve an 80% or higher on this assignment.

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