More Lessons for GCSE Maths Math Worksheets A collection of videos to help GCSE Maths students learn how to calculate compound interest. P = principal amount (the initial amount you borrow or deposit) r = annual rate of interest (as a decimal) t = number of years the amount is deposited or borrowed for. Principal: The money borrowed (or the money lent) is called principal. Compound Interest and Depreciation. How to calculate compound interest. Amount: The sum of the principal and the interest is called amount. advertisement. Now that you understand the basic calculation for simple interest, it’s time to familiarize yourself with how to figure compound interest, which really shows the time value of money. Examples of finding the future value with the compound interest formula. Using the E ective Annual Yield If interest at an annual rate of r is compounded n times a year, i.e. Compound interest Examples: 1. Compound measures speed = density = pressure = Volumes Cuboid = l × w × h Prism = area of cross section × length Cylinder = πr2h Volume of pyramid = × area of base × h distance time mass volume force area Speed Density Pressure D S T M D V F P A Trigonometric formulae Sine Rule = = Cosine Rule a2 = b2 + c2 - 2bc cos A Interest: It is the additional money besides the original money paid by the borrower to the money lender in lieu of the money used. A = amount of money accumulated after n years, including interest. The compound interest formula can be used to calculate the value of such an investment after a given amount of time, or to calculate things like the doubling time of an investment. Compound interest, number e and natural logarithm. GCSE Maths - 10 Q + A - Compound Interest Formula Includes worked answers. You figure compound interest on both the amount of principal and any interest earned but not withdrawn. An index of all the infographics posted on the site – just click the desired section to go to the relevant page, and see all graphics posted to that category. $2,500 for 4 years at 2.4% compounded monthly View Answer Marcus received an inheritance of … The following diagram gives the Compound Interest Rate Formula where the interest is compounded once per year. Compound Interest Formula . Visit the post for more. We will see examples of this below. FREE Maths revision notes on the topic: COMPOUND INTEREST by expert teachers for the Edexcel GCSE (9-1) Maths exam. Hold on to your hats! Use the compound interest formula to complete the total amount accumulated and the interest earned. Scroll down the page for more examples and solutions. r=n times of the current balance is added n times a year, then, with an initial deposit P, the balance t years later is B = P 1 + r n nt: Thus, amount = principal +interest. This is the second video dealing with GCSE compound interest question.
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