Algebra-1 Problems

3.9 Percentages
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1.

Write 93% as a decimal

\begin{equation}93\end{equation}

2.

Write 6/8% as a decimal

\begin{equation}\frac{6}{8}\end{equation}

3.

Write 171% as a decimal

\begin{equation}171\end{equation}

4.

Express 3 as percentage

\begin{equation}3\end{equation}

5.

Express 2/9 as percentage

\begin{equation}\frac{2}{9}\end{equation}

6.

What is 10% of 3?

\begin{equation}\frac{10}{100} \times 3=x\end{equation}

7.

What percent of 45 is 117/20?

\begin{equation}\frac{x}{100} \times 45=\frac{117}{20}\end{equation}

8.

63% of what is 63/10?

\begin{equation}\frac{63}{100} \times x=\frac{63}{10}\end{equation}

9.

Population of a certain city decreased to 8% that of last year's. The population now is 43688. What was it last year?

\begin{equation}\frac{8}{100} \times x=43688\end{equation}

10.

The stock market index is now at 858, which is 78% of last year's value. Where was it at last year?

\begin{equation}x \times \frac{78}{100}=858\end{equation}

11.

So far this week you have worked 9/2 hours at your part time job. This is 30% of the number of hours you work each week. How many hours do you work each week?

\begin{equation}x \times \frac{30}{100}=\frac{9}{2}\end{equation}

12.

Sales tax rate in State X is 85%. Estimate the sales tax on a model of a Pirate Ship that costs $\$2900$.

\begin{equation}2900 \times \frac{85}{100}\end{equation}

13.

In a purchase, customers pay 9% sales tax over an above the price of the article. You buy a skateboard with a printed price $\$55$, what is the total cost, with taxes, you'll need to pay?

\begin{equation}55+55 \times \frac{9}{100}\end{equation}

14.

According to a nation's census, State X had about 4836700 residents. Of those, 13% are under age 18. How many of State X's residents are under the age of 18?

\begin{equation}4836700 \times \frac{13}{100}\end{equation}

15.

A storage device has 3100 megabytes of storage space. What percent of the space is used by a file that takes up 558 megabytes?

\begin{equation}\frac{x}{100} \times 3100=558\end{equation}

16.

A pharmacy discount card gives the user 22% off prescriptions. Mr. Kumar's cholesterol medication normally costs $\$6$. What is the final price with the discount card?

\begin{equation}90-6 \times \frac{22}{100}\end{equation}

17.

A major city's public transport system sells $\$50$ tickets at a discounted price of $\$37$. What percentage is the discount?

\begin{equation}\frac{50-37}{50} \times 100\end{equation}

18.

A textbook salesperson is paid a base salary of $\$21700$ plus a 3% commission on sales. Her total sales last year were $\$71900$. Find her total pay last year?

\begin{equation}21700+71900 \times \frac{3}{100}\end{equation}