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When working with percentages, remember that 'percent' means 'per hundred.' For example, 9% can be understood as 9 out of every 100. This is a very common way to express proportions and is used widely in various fields such as mathematics, finance, and statistics.
Percent notation helps in comparing quantities easily. For instance, if one student scores 90% on a test and another scores 80%, it's immediately clear who performed better because we are comparing out of the same base, which is 100.
Remember, the percent symbol (%) always indicates a ratio out of 100.

To convert a percentage to a fraction, start by understanding that the percent represents a part of 100. For example, 9% means 9 out of 100.
Here is the step-by-step method to convert percent to fraction:

• Remove the percent symbol (%)
• Write the number as a fraction with 100 as the denominator

Using 9% as an example, follow these steps:
1. Remove the percent symbol to get 9.
2. Write it as a fraction over 100, giving you \( \frac{9}{100} \).
This fraction now represents the percentage as a part of a whole.

Simplifying fractions means reducing them to their lowest terms. This involves dividing both the numerator and the denominator by their greatest common divisor (GCD).
For the fraction \( \frac{9}{100} \), check if there are common factors between 9 and 100. The greatest common divisor of 9 and 100 is 1 because they do not share any other common factors.
Thus, the fraction \( \frac{9}{100} \) is already in its simplest form.
When simplifying fractions, always check if both parts of the fraction can be divided by the same number. If they can, continue dividing until you cannot reduce the fraction further.
Simplified fractions are easier to work with and understand, so always check if you can simplify a fraction.