Ratios and Proportions Percents Flashcard

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 simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor (GCD).

Front

What is a proportion?

Back

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

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply and then divide to find the unknown value.

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100.

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form).

Front

What is the formula for finding the sale price after a discount?

Back

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

Front

How do you find the original price from a sale price?

Back

Original Price = Sale Price / (1 - Discount Rate).

Front

What is the ratio of flour to sugar in a recipe that calls for 2 cups of flour and 3 cups of sugar?

Back

The ratio of flour to sugar is 2:3.

Front

If a car travels 240 miles in 4 hours, what is the speed in miles per hour?

Back

The speed is 60 miles/hour.