# 6.11: Percent Equation to Find Part a

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Amount

Amount

In a proportion, the amount is the part of the base that is being calculated.Base

Base

In the context of the percent equation, the base is the part of the whole from which the amount is calculated.Decimal

Decimal

In common use, a decimal refers to part of a whole number. The numbers to the left of a decimal point represent whole numbers, and each number to the right of a decimal point represents a fractional part of a power of one-tenth. For instance: The decimal value 1.24 indicates 1 whole unit, 2 tenths, and 4 hundredths (commonly described as 24 hundredths).Inverse Operation

Inverse Operation

Inverse operations are operations that "undo" each other. Multiplication is the inverse operation of division. Addition is the inverse operation of subtraction.Percent

Percent

Percent means out of 100. It is a quantity written with a % sign.Proportion

Proportion

A proportion is an equation that shows two equivalent ratios.### Image Attributions

## Description

Learn how to solve for a by using proportions and cross multiplication

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## Date Created:

Nov 30, 2012## Last Modified:

Jan 26, 2016## Vocabulary

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