Calculate a tip or gratuity and get the total amount to pay. Enter your meal or dinner cost along with the tip percentage. If you are splitting the cost at a restaurant among several people you can divide by the number of people to get...

Use the Rule of 72 to estimate how long it will take to double an investment at a given interest rate. Divide 72 by the interest rate to see how long it will take to double your money on an investment.

Students investigate the worth of a (US) dollar or a (British) pound, the relative value, purchasing power, and inflation rates. The resource consists of explanations, calculators, measures of worth, and data sets.

Test your bargin shopping skills by figuring out which discount offers the greatest savings. A one page activity from the NCTM Math Challenges for Families series that focuses on understanding and calculating percentages. Connections...

[Free Registration/Login Required] This is a differentiated interactive flipchart in which students visit an ice-cream shop, computer shop and fish & chip shop to calculate change from $10 for various items.

Dr. Math is asked about calculating sales tax. A quick and easy to follow explanation of how it works using fractions, decimals, ratio, and percent.

What kind of unit conversion would you like to do? This site will allow you to do a multitude of conversions. Just click on the specific measurement you are needing to convert. It also provides a history of measurements and a chart of...

Test your knowledge of multiplication and division.

By the end of this section, you will be able to do the following: Analyze whether monetary policy decisions should be made more democratically; Calculate the velocity of money; Evaluate the central bank's influence on inflation,...

This student-teacher resource discusses international exchange rate and shows how to calculate different currencies around the world.

Provides online programs and explanations on everyday math: calculating a tip at a restaurant, determining the sale price of an item, finding the odds of winning a lottery, computing simple and compound interest, and more.

Find information on everything from buying energy-efficient products to using the proper landscaping for particular climates to conserve resources. Starting with an energy assessment, this website will help users reduce their consumption...

By the end of this section, you will be able to contrast nominal GDP and real GDP, explain the GDP deflator, and calculate real GDP based on nominal GDP values.

Practice coin word problems. This calculator helps you practice word problems that involve addition and multiplication using coins.

KS3 Math provides interactive activities on percentages, using pence and pounds. Use the factsheet for percentage information. You may use the worksheet for percentage practice and take the test provided to check your percentage skills....

Practice fractions, counting money, understanding spatial relationships, perimeter measurement, and basic arithmetic calculations such as adding, subtracting, simple multiplying and dividing while earning points in this fast-paced game.