91Ó°ÊÓ

The price of a color printer is reduced by \(30 \%\) of its original price. When it still does not sell, its price is reduced by \(20 \%\) of the reduced price. The salesperson informs you that there has been a total reduction of \(50 \%\). Is the salesperson using percentages properly? If not, what is the actual percent reduction from the original price?

Describe how to express a percent as a decimal number and give an example.

What is effective annual yield?

My weight increased by \(1 \%\) in January and \(1 \%\) in February, so my increase in weight over the two months is \(2 \%\).

My rent increased from \(20 \%\) to \(30 \%\) of my income, so the percent increase is \(10 \%\).

Use the future value formulas for simple and compound interest in one year to derive the formula for effective annual yield.

A condominium is taxed based on its \(\$ 78,500\) value. The tax rate is \(\$ 3.40\) for every \(\$ 100\) of value. If the tax is paid before March \(1,3 \%\) of the normal tax is given as a discount. How much tax is paid if the condominium owner takes advantage of the discount?