Help with rate of sales tax

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asked Dec 22, 2018 40.7k views

1 Answer

Thilak Raj · Answer 1 · 2018-12-27T12:32:29+0000

well, he paid 20.51 total, but the retail price is just 18.99, so he ended up paying 20.51 - 18.99 extra, or 1.52.

so, if we take 18.99 to be the 100%, how much is 1.52 in percentage off of it?

$\bf \begin{array}{ccll} amount&\%\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ 18.99&100\\ 1.52&t \end{array}\implies \cfrac{18.99}{1.52}=\cfrac{100}{t}\implies t=\cfrac{1.52\cdot 100}{18.99}$

Help with rate of sales tax

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