IXL | Find the percent: markups and sales

Haley is shopping online and finds a great deal on model solar systems. Haley pays $36 for a model solar system that originally sold for $60. What is the discount, as a percentage?

Write your answer using a percent sign (%).

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question

Marvin, the owner of an e-commerce site, buys nightstands for $20 and then sells them on his site for $30. What percentage is the mark-up?

Write your answer using a percent sign (%).

key idea

percent of change

amount of change

original amount

percent of change

amount of change

original amount

solution

The percent of change formula can be used to find percent of mark-up.

percent of mark-up

selling price − purchase price

purchase price

percent of mark-up

selling price − purchase price

purchase price

Plug $20 and $30 into the formula and simplify.

percent of mark-up

selling price − purchase price

purchase price

$30 − $20

$20

$10

$20

0.5

percent of mark-up

selling price − purchase price

purchase price

$30 − $20

$20

$10

$20

0.5

Write the number as a percent.

0.5 → 50%

The percent of mark-up is 50%.

Looking for more? Try these:

Lesson: Percent change

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