Proportions, Percent Proportions and Unit Rates Test

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you find a percent of a number?

Back

To find a percent of a number, multiply the number by the percent (as a decimal). For example, 20% of 75 is 0.20 * 75 = 15.

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It is expressed as a quantity per 1 unit of another quantity.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and then multiply by 100.

Front

What is the formula for finding the percent grade?

Back

Percent grade = (Number of correct answers / Total number of questions) * 100.

Front

What does it mean for two ratios to be proportional?

Back

Two ratios are proportional if they can be expressed as equivalent fractions.

Front

How do you calculate a unit rate from a given rate?

Back

To calculate a unit rate, divide the total quantity by the number of units. For example, if a car travels 50 miles in 1 hour, the unit rate is 50 miles per hour.

Front

What is the relationship between ratios and proportions?

Back

Ratios compare two quantities, while proportions state that two ratios are equal.

Front

How do you determine if two ratios are proportional?

Back

Cross-multiply the ratios. If the products are equal, the ratios are proportional.

Front

What is the percent proportion formula?

Back

The percent proportion formula is: part/whole = percent/100.