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Big Ideas Math: Modeling Real Life, Grade 7

BI

Big Ideas Math: Modeling Real Life, Grade 7 View details

5. Discounts and Markups

Finish the assignment

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Exercise 1 Page 260

How do you calculate 20 % of $50?

$ 40

Practice makes perfect

In order to find the discounted price of the skateboard, we need to subtract the discount in dollars from the original price. Original price- Discount= New priceFirst, we have to find the cost subtracted by the discount, which is 20 % of $50. We can find the value of the discount by multiplying the original price by the discount rate.

$50* 20 %

Write as a decimal

$50* 0.2

Use a calculator

$10

Finally, by subtracting $10 from $50, we get the new price including the discount. $50- $10= $ 40

Checking Our Answer

Checking Our Answer

We can use a model to check our answer.

Subchapter links

Try It p.260-261

Self-Assessment for Concept & Skills p.261

Self-Assessment for Problem Solving p.262

Review & Refresh p.263

Concept, Skills, & Problem Solving p.263-264