Question

Drew bought a chemistry book for $30. Later that book was marked down by 20%. By how much has the value been decreased?

Answer 1

the value has decreased by $6 so the final price of the book is $24

Explanation:

use the
`(part)/(whole) = (part)/(whole)` formula

replace the first part with 20 and whole with 100

for the second part substitute it with a variable and the whole is the original price so it would be 30

cross multiply, then divide to get the final answer

Answer 2

6.00

Explanation:

We need to find the discount

Discount = original amount * percent discount

30 *20%

30 .2

6

They marked down the book by 6 dollars