Ratios, Rates and 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 convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator (top number) by the denominator (bottom number).

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100. It is denoted using the symbol '%'. For example, 45% means 45 out of 100.

Front

How do you find the percent of a number?

Back

To find the percent of a number, multiply the number by the percent (as a decimal). For example, to find 60% of 50, calculate 50 * 0.60 = 30.

Front

What is the relationship between fractions, decimals, and percents?

Back

Fractions, decimals, and percents are different ways to represent the same value. For example, 1/2 = 0.5 = 50%.

Front

How do you compare percentages?

Back

To compare percentages, convert them to the same format (either all to decimals or all to fractions) and then compare the values.

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as speed (distance per time) or price per item.

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 150 miles in 3 hours, the unit rate is 150 miles / 3 hours = 50 miles per hour.

Front

What is the formula for finding the total amount after a percent increase?

Back

Total Amount = Original Amount + (Original Amount * Percent Increase).

Front

How do you convert a decimal to a percent?

Back

To convert a decimal to a percent, multiply the decimal by 100 and add the percent symbol. For example, 0.75 = 75%.