Ratios, Unit Rates, Percents

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Front

How do you write a ratio in simplest form?

Back

To write a ratio in simplest form, divide both terms of the ratio by their greatest common divisor.

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity of one.

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the first quantity by the second quantity.

Front

What is a percent?

Back

A percent is a ratio that compares a number to 100, often used to express how much of something there is.

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

How do you convert a percent to a decimal?

Back

To convert a percent to a decimal, divide the percent by 100.

Front

What is the formula to find the percent decrease?

Back

Percent decrease = (Original Price - New Price) / Original Price x 100.

Front

If a shirt costs $50 and is on sale for $40, what is the percent discount?

Back

Percent discount = (50 - 40) / 50 x 100 = 20%.

Front

What does it mean for two ratios to be equivalent?

Back

Two ratios are equivalent if they represent the same relationship between quantities.