The Markup Formula

Formula Used to calculate: The amount added to the cost of an item to determine its selling price. — What Is the Markup Formula? The markup formula calculates the difference between an item’s selling price and its cost. Markup represents the amount added above cost and can be expressed as a monetary amount or as … Read more

The Discount Formula

Formula Used to calculate: The amount by which an original price is reduced when a percentage discount is applied. — What Is the Discount Formula? The discount formula calculates the amount subtracted from an original price when a percentage discount is applied. The discount amount can then be subtracted from the original price to determine … Read more

The Compound Interest Formula

Formula Used to calculate: The future value of a principal amount when interest is compounded at regular intervals. — What Is the Compound Interest Formula? The compound interest formula calculates the future value of an initial principal when interest is periodically added to the balance. Unlike simple interest, compound interest allows previously accumulated interest to … Read more

The Simple Interest Formula

Formula Used to calculate: The amount of interest earned or owed on a principal amount when interest does not compound. — What Is the Simple Interest Formula? The simple interest formula calculates interest based only on the original principal. Unlike compound interest, previously earned or accumulated interest is not added to the principal when calculating … Read more

The Unit Rate Formula

Formula Used to calculate: The amount of one quantity corresponding to one unit of another quantity. — What Is the Unit Rate Formula? The unit rate formula compares two quantities by dividing one quantity by another so that the second quantity has a value of one. It expresses how much of the first quantity corresponds … Read more

The Proportion Formula

Formula Used to calculate: Whether two ratios are equal and to find an unknown value when three terms of a proportion are known. — What Is the Proportion Formula? The proportion formula states that two ratios are equal. It represents a relationship in which the quantities in one ratio have the same relative relationship as … Read more

The Ratio Formula

Formula Used to calculate: The relative size of one quantity compared with another quantity. — What Is the Ratio Formula? The ratio formula compares two quantities by dividing one quantity by another. A ratio describes how much of one quantity there is relative to another and can be written as a fraction, with a colon, … Read more

The Percent Error Formula

Formula Used to calculate: The size of the error between a measured or experimental value and an accepted value, expressed as a percentage of the accepted value. — What Is the Percent Error Formula? The percent error formula measures how far a measured or experimental value is from an accepted or reference value. It compares … Read more

The Percentage Decrease Formula

Formula Used to calculate: The percentage by which a value has decreased relative to its original value. — What Is the Percentage Decrease Formula? The percentage decrease formula measures how much a value has fallen compared with its original value. It expresses the decrease as a percentage of the original value. — Formula and Variables … Read more

The Percentage Increase Formula

Formula Used to calculate: The percentage by which a value has increased relative to its original value. — What Is the Percentage Increase Formula? The percentage increase formula measures how much a value has grown compared with its original value. It expresses the increase as a percentage of the original value. — Formula and Variables … Read more