Answer:
The markup is the difference between the selling price and the cost price, divided by the cost price, then multiplied by 100 to get a percentage.
The difference between the selling price and the cost price is $15 - $9.38 = $5.62.
So, the percent of markup is ($5.62 / $9.38) x 100 = 59.91%.
Rounding to the nearest percent, we get 60%. So, Kerri is marking up the doll clothes by 60%.