Multi-Step Ratio & Percent Problems (7.RP.A.3)

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 percentage of a number?

Back

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

Front

What is a percent decrease?

Back

Percent decrease is a measure of how much a quantity has decreased relative to its original amount, expressed as a percentage.

Front

How do you find the percent decrease?

Back

Percent decrease = (Original Value - New Value) / Original Value x 100%.

Front

What is a tip in the context of dining?

Back

A tip is a small amount of money given to service workers, typically calculated as a percentage of the total bill.

Front

How do you calculate a tip?

Back

To calculate a tip, multiply the total bill by the tip percentage (in decimal form). For example, for an $18.75 bill with an 18% tip, calculate 18.75 x 0.18 = $3.38.

Front

What is simple interest?

Back

Simple interest is a method of calculating the interest charge on a loan based on the original principal amount.

Front

How do you calculate simple interest?

Back

Simple Interest = Principal x Rate x Time. For example, for a $3,000 loan at 4% for 4 years, the interest is 3000 x 0.04 x 4 = $480.

Front

What is a discount?

Back

A discount is a reduction in the price of a product or service, often expressed as a percentage of the original price.

Front

How do you calculate the amount of a discount?

Back

To calculate the discount amount, multiply the original price by the discount percentage (in decimal form). For example, for a $251 phone with a 40% discount, calculate 251 x 0.40 = $100.40.