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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.

Sagot :

Solution:

[tex]30 - (30*0.80) = 30 - 24 = 6[/tex]

or you can do

[tex]30 * 0.20 = 6[/tex]
30 over 100 times 20= 6
so it decreased by 6 dollar