A shirt is on sale for 25 dollar at the local department...

A shirt is on sale for $\$ 25 dollar at the local department store. The sales tax equals $\frac{1}{25}$ of the shirt's price. What is the total cost of the shirt including sales tax? $$ \begin{array}{ll}{\text { (A) } \$ 17} & {\text { (B) } \$ 26}\end{array} $$ $$ \begin{array}{ll}{\text { (C) } \$ 27} & {\text { (D) } \$ 33}\end{array} $$

A shirt is on sale for $\$ 25 dollar at the local department store. The sales tax equals $\frac{1}{25}$ of the shirt's price. What is the total cost of the shirt including sales tax?

$$
\begin{array}{ll}{\text { (A) } \$ 17} & {\text { (B) } \$ 26}\end{array}
$$
$$
\begin{array}{ll}{\text { (C) } \$ 27} & {\text { (D) } \$ 33}\end{array}
$$

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Key Concepts

Fraction

A fraction is a numerical quantity that represents a part of a whole. It is expressed as one number (the numerator) divided by another number (the denominator) and is a fundamental way to represent ratios and proportions in mathematics.

Sales Tax Calculation

Sales tax calculation involves computing an additional charge that is applied as a proportion of an item's price. This additional cost is represented as a fraction or percentage of the base price, and understanding how to compute it is key to financial literacy.

Addition for Total Cost

Addition for total cost refers to the process of combining the base price with any additional fees or taxes to determine the final amount that needs to be paid. This operation is essential in ensuring that all components of a purchase are appropriately accounted for.

Proportional Reasoning

Proportional reasoning involves using the relationship between parts of a whole to solve problems. In the context of computing costs, it is used to scale the fraction of the price, such as a sales tax rate, to find the corresponding tax amount on the given base price.

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