A computer store pays 6 dollars for a computer mouse. The percent of markup is 75%. Find the mouse’s selling price.

Sure, here are the steps to find the mouse's selling price:

Step 1: First, we need to find the markup amount. The markup is 75% of the cost price. So, we calculate 75% of 6 dollars.

Step 2: To find 75% of 6 dollars, we multiply 6 by 75/100 (since percent means per hundred).

6 * 75/100 = 4.5 dollars

So, the markup amount is 4.5 dollars.

Step 3: Finally, we add the markup amount to the cost price to find the selling price.

6 dollars (cost price) + 4.5 dollars (markup) = 10.5 dollars

So, the selling price of the mouse is 10.5 dollars.