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# Percentages in Numerical Reasoning Test

Calculating percentages in a numerical reasoning test involves understanding the basic concept of percentages and applying it to various scenarios. Here’s a step-by-step guide:

1. Understand the Concept: A percentage is a fraction of 100. It represents a part of a whole. For example, 25% means 25 out of 100, or one-fourth.
2. Convert Percentage to Decimal: To work with percentages, it’s often useful to convert them to decimal form. To do this, divide the percentage value by 100. For example, 25% is 0.25 as a decimal.
3. Calculate Percentage of a Number: To find a percentage of a given number, multiply the number by the decimal form of the percentage. For example, to find 25% of 80, you would multiply 80 by 0.25, resulting in 20.
4. Find the Original Number: Sometimes, you might be given the percentage and the result, and you need to find the original number. In this case, divide the result by the decimal form of the percentage. For example, if you know that 20 is 25% of a number, divide 20 by 0.25 to find the original number, which is 80.
5. Percent Change: If you’re asked to calculate a percentage increase or decrease between two numbers, subtract the original number from the new number to find the difference. Then, divide the difference by the original number and multiply by 100 to get the percentage change.
6. Practice: The key to mastering percentage calculations is practice. Work through various examples and practice questions to become familiar with different types of percentage problems.

Remember to double-check your calculations and ensure you understand the context of the problem before attempting to solve it. With practice and a solid understanding of the concept, you’ll be able to tackle percentage questions effectively in numerical reasoning tests.

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