Algebra-1 Problems

3.9 Percentages


Problem #

Problem Statement

Problems Similar To

1.

Write 20% as a decimal

\begin{equation}20\end{equation}

2.

Write 10/9% as a decimal

\begin{equation}\frac{10}{9}\end{equation}

3.

Write 171% as a decimal

\begin{equation}171\end{equation}

4.

Express 9 as percentage

\begin{equation}9\end{equation}

5.

Express 6/6 as percentage

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

6.

What is 5% of 8?

\begin{equation}\frac{5}{100} \times 8=x\end{equation}

7.

What percent of 59 is 1357/50?

\begin{equation}\frac{x}{100} \times 59=\frac{1357}{50}\end{equation}

8.

15% of what is 21/20?

\begin{equation}\frac{15}{100} \times x=\frac{21}{20}\end{equation}

9.

Population of a certain city decreased to 17% that of last year's. The population now is 19550. What was it last year?

\begin{equation}\frac{17}{100} \times x=19550\end{equation}

10.

The stock market index is now at 5680, which is 80% of last year's value. Where was it at last year?

\begin{equation}x \times \frac{80}{100}=5680\end{equation}

11.

So far this week you have worked 21/50 hours at your part time job. This is 7% of the number of hours you work each week. How many hours do you work each week?

\begin{equation}x \times \frac{7}{100}=\frac{21}{50}\end{equation}

12.

Sales tax rate in State X is 32%. Estimate the sales tax on a model of a Pirate Ship that costs $\$2900$.

\begin{equation}2900 \times \frac{32}{100}\end{equation}

13.

In a purchase, customers pay 4% sales tax over an above the price of the article. You buy a skateboard with a printed price $\$62$, what is the total cost, with taxes, you'll need to pay?

\begin{equation}62+62 \times \frac{4}{100}\end{equation}

14.

According to a nation's census, State X had about 9015700 residents. Of those, 18% are under age 18. How many of State X's residents are under the age of 18?

\begin{equation}9015700 \times \frac{18}{100}\end{equation}

15.

A storage device has 1800 megabytes of storage space. What percent of the space is used by a file that takes up 288 megabytes?

\begin{equation}\frac{x}{100} \times 1800=288\end{equation}

16.

A pharmacy discount card gives the user 83% off prescriptions. Mr. Kumar's cholesterol medication normally costs $\$8$. What is the final price with the discount card?

\begin{equation}20-8 \times \frac{83}{100}\end{equation}

17.

A major city's public transport system sells $\$55$ tickets at a discounted price of $\$40$. What percentage is the discount?

\begin{equation}\frac{55-40}{55} \times 100\end{equation}

18.

A textbook salesperson is paid a base salary of $\$67100$ plus a 2% commission on sales. Her total sales last year were $\$56600$. Find her total pay last year?

\begin{equation}67100+56600 \times \frac{2}{100}\end{equation}