Question

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

Answer 1

Solution:

$30 - (30*0.80) = 30 - 24 = 6$

or you can do

$30 * 0.20 = 6$

Answer 2

30 over 100 times 20= 6
so it decreased by 6 dollar