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------------------------------------------------ Mei paid [tex]\$1.64[/tex] in sales tax on a purchase of [tex]\$20.50[/tex].

Answer :

Sure! To find the sales tax rate that Mei paid, we can follow these steps:

1. Identify the Purchase Amount and Sales Tax Paid:
- The purchase amount is [tex]$20.50.
- The sales tax paid is $[/tex]1.64.

2. Calculate the Sales Tax Rate:
You can find the sales tax rate by dividing the sales tax paid by the purchase amount. This will give you the rate as a decimal.

[tex]\[
\text{Sales Tax Rate} = \frac{\text{Sales Tax Paid}}{\text{Purchase Amount}} = \frac{1.64}{20.50}
\][/tex]

3. Convert the Sales Tax Rate to a Percentage:
To express the sales tax rate as a percentage, multiply the rate in decimal form by 100.

[tex]\[
\text{Sales Tax Percentage} = \text{Sales Tax Rate} \times 100
\][/tex]

Following these steps, the sales tax rate is 0.08 when expressed as a decimal, and as a percentage, the sales tax is 8.0%. Thus, Mei paid an 8% sales tax on her purchase.