Assessment and Learning in Knowledge Spaces (ALEKS) Practice Exam

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What common mistake should be avoided when calculating percentages?

Rounding numbers too early
Not converting the percentage to a decimal before calculation
Using a calculator
Ignoring the total amount

The correct answer is: Not converting the percentage to a decimal before calculation

When calculating percentages, it's important to remember that converting the percentage to a decimal is a necessary step for accurate computation. Percentages represent a fraction of 100, so to perform mathematical operations, the percentage must first be expressed as a decimal. For example, 25% should be converted to 0.25 by dividing by 100. This conversion allows for easier multiplication when you are finding a percentage of a particular value. If one does not convert the percentage to a decimal before attempting calculations, the result will be incorrect. This is a common misconception that can lead to errors in various contexts where percentages are used, such as in finance, statistics, or any measurement involving ratios. By ensuring the percentage is converted to a decimal, you set the stage for accurate calculations that reflect the intended proportions and comparisons.