Answer:
you divide 144 by 90: 144/90, and get 1.6, 160% markup, or just 1.6 markup
Explanation:
$144
First you do .60 × 90 to get how much he added onto the original price. That was $54, then I added the original price. So I did 90 + 54 and got $144. Hope this helps! If you are still confused please comment!
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