Question

Karen paid $43.70 for a book. The price of the book was $40. what was the sales tax rate?

Answer 1

Answer:

9.25%

Step-by-step explanation:

Let the Sales tax rate =x%

the we know Sales tax = Paid Price of Book - price of Book

=43.70-40=$3.70

Hence as sales tax is on price of book so

x% of 40 = 3.70

$40\cdot \frac{x}{100}=3.7\\\\\mathrm{Refine\:}40\cdot \frac{x}{100}:\quad \frac{2x}{5}\\\frac{2x}{5}=3.7\\\mathrm{Multiply\:both\:sides\:by\:}5\\\frac{2x}{5}\cdot \:5=3.7\cdot \:5\\\\\mathrm{Simplify}\\x=9.25$