Ratio, 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 calculate a percent of a number?

Back

To calculate a percent of a number, multiply the number by the percent (as a decimal). For example, to find 20% of 50, calculate 50 x 0.20 = 10.

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 one unit of another quantity.

Front

If a shirt costs $30 and is on sale for 25% off, what is the sale price?

Back

The sale price is $22.50.

Front

What does it mean to mark up a price?

Back

To mark up a price means to increase the original price of an item by a certain percentage.

Front

What is the formula to find the new price after a discount?

Back

New Price = Original Price - (Original Price x Discount Rate).

Front

If 15 is 30% of what number, what is that number?

Back

The number is 50.

Front

What is the ratio of 3 apples to 5 oranges?

Back

The ratio is 3:5.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the top number (numerator) by the bottom number (denominator) and multiply by 100.

Front

What is the new price of an item that costs $60 after a 15% discount?

Back

The new price is $51.