Expresses the relationship between two or more quantities.

A ratio of two quantities measured in different units.

A rate that has a denominator of 1 when expressed in fraction form.

Two ratios are called ... ratios when they have the same value.

Equation that states two ratios are equal

To solve proportions, we can use

Percent

When a percent problem is being written as an equation, the key word "of" is used to indicate

A percent of change indicates

When a person invests or borrows an amount of money, the amount of money she earns or pays for borrowing the money is called

The amount of money originally invested or borrowed is called

Interest that is earned or paid only on the principal is called

The simple interest earned or paid per year

Formula for simple interest

The balance of an account earning simple annual interest is the sum of

Interest that is earned on both the principal and any interest that has been earned previously