Answer
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Step 1: Recall the definition of a percentage
A percentage is a way of expressing a number as a fraction of 100. So, 90% means 90 parts out of 100.
Step 2: Convert the percentage to a decimal
90 \% = \frac{90}{100}
To convert a percentage to a decimal, divide the percentage by 100. In this case, we have:
Final Answer
90% as a decimal is $\frac{9}{10}$ or 0.9.
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