12/11 Flashcard: Ratios, Unit Rates, Percents

Front

What is a Ratio?

Back

A ratio is a comparison of two quantities.

Front

How do you calculate a Unit Rate?

Back

To calculate a unit rate, divide the quantity by the number of units. For example, if a car travels 50 miles in 40 minutes, the unit rate is 50 miles / 40 minutes = 1.25 miles per minute.

Front

What is 40% of 200?

Back

40% of 200 is 80.

Front

If a package originally contains 50 ounces and is decreased by 20%, how many ounces remain?

Back

40 ounces remain.

Front

What is the formula to find the percent of a number?

Back

The formula is: Percent = (Part/Whole) x 100.

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 multiply by 100.

Front

What is the missing number in the ratio 3:5 if the first number is 21?

Back

The missing number is 35.

Front

If a car travels 60 miles in 1 hour, what is its speed in miles per minute?

Back

The speed is 1 mile per minute.

Front

What is a Unit Rate?

Back

A unit rate is a rate in which the second quantity is 1.

Front

If 30% of a number is 15, what is the number?

Back

The number is 50.