Question

Find the total price of each item.

Pillow: $9.99

tax: 6.75%

Short answer

The total cost of a pillow is $10.6643.

Step-by-step solution

Step 1. Use the definition of the percentage change.

The percent change is the increase or decrease in the value of a quantity. If the new value is larger than the original value then it is a percent increase and if the change in value is lesser than the original value it is called percentage decrease.

Step 2. Concept of sales tax.

Sales tax is a tax that is added to the price of the item the final price is called selling price. It is a percent of the increase in the cost.

Step 3. Find the new price. 

We are given the following price and the tax percentages:

Pillow: $9.99

tax: 6.75%

The tax is 6.75% of the price. We will add this amount to the original price.

So, If x represents the new price after adding taxes then we have:

$\begin{array}{l}x=6.75\%\text{ofCost+Cost}\\ x=6.75\%\times \$9.99+\$9.99\\ x=\frac{6.75}{100}\times 9.99+9.99\\ x=0.0675\times 9.99+9.99\\ x=0.6743+9.99\\ x=\$10.6643\end{array}$

Thus, the total cost of a pillow is $10.6643.