Unit 4 Ratio, Proportion and Percent

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 find the percent of a quantity?

Back

To find the percent of a quantity, divide the part by the whole and multiply by 100.

Front

What is the formula for percent change?

Back

Percent Change = ((New Value - Old Value) / Old Value) * 100.

Front

What does a percent increase mean?

Back

A percent increase indicates how much a value has grown compared to its original amount.

Front

What does a percent decrease mean?

Back

A percent decrease indicates how much a value has shrunk compared to its original amount.

Front

How do you calculate the total cost after a discount?

Back

Total Cost = Original Price - (Original Price * Discount Rate).

Front

What is sales tax?

Back

Sales tax is a percentage added to the price of goods and services, collected by the seller.

Front

How do you calculate the final price including sales tax?

Back

Final Price = Original Price + (Original Price * Sales Tax Rate).