Computing Successive Percentages: Proportions and Equations

Computing Successive Percentages: Proportions and Equations

Assessment

Interactive Video

Mathematics, Business

1st - 6th Grade

Hard

Created by

Quizizz Content

FREE Resource

The video tutorial explains how to calculate successive percentages using proportions and equations. It begins with a problem involving discounts and tax on a computer purchase. The lesson reviews solving percentage problems with equations and proportions, addresses common misconceptions, and provides a step-by-step calculation of discounts and tax. The tutorial concludes by emphasizing the correct strategy for calculating percentages, highlighting the importance of applying each percentage to the correct amount.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What was the original price of Eli's computer before any discounts?

$350

$297.50

$500

$319.07

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a correct method to solve percentage problems?

Ignoring the order of percentage changes

Using proportions and equations

Multiplying all percentages directly

Adding all percentage changes together

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the sale price of the computer after a 30% discount?

$500

$150

$297.50

$350

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How much is the final price of the computer after applying all discounts and tax?

$350

$297.50

$319.07

$286.25

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the equivalent percentage of a 15% discount?

100% of the sale price

15% of the original price

85% of the sale price

70% of the original price

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the tax rate applied to the final price after discounts?

10%

15%

7.25%

5%

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why can't we simply add up all percentage changes to find the final price?

Because percentages are always added to the original price

Because each percentage is applied to a different amount

Because percentages are not real numbers

Because the tax rate is too high