A customer purchases $78 of goods. If they are charged an additional $6.63 in sales tax, calculate the percent sales tax.

Question

Quizplus · Accepted Answer

In this problem, you are given the total value of the goods ($78) and then the additional tax paid ($6.63). We are looking for the sales tax percentage, or what percent $6.63 is of $78.00. We can use the percent formula to solve. The percent formula is below: ^part⁄_whole = ^%⁄₁₀₀ Based on the text, these are the values we will plug into the percent formula to solve: Whole: the original "whole" price of the groceries before the tax is applied was $78 Part: the value of the added sales tax $6.63 %: this is what we are looking for, so this is where we will put our variable (x). ^part⁄_whole = ^%⁄₁₀₀ ^6.63⁄₇₈ = ^x⁄₁₀₀ Cross multiply and solve for x: ^6.63⁄₇₈ = ^x⁄₁₀₀ 78 * x = 6.63 * 100 78x = 663 78x/78 = 663/78 x = 8.5 So, $6.63 is 8.5% of $78.

A Customer Purchases $78 of Goods