YSK that X% of Y equals Y% of X. So, if you want to find out what 9% of 50 is, you can instead find out what 50% of 9 is, which is 4.5. This means that 9% of 50 is also equal to 4.5.
Another example: 12% of 25 is equal to 25% of 12, which is 3. This also means that 12% of 25 is equal to 3.
An alternative method to calculating percentages is to multiply the two numbers \(so you would multiply 50 and 9\) and then divided by 100. So 50 times 9, and then divided by 100 would still yield the same result, which is 4.5.
You should know how to do percentage problems like this in case you ever have to calculate the tax of something or if your profession requires you to know percentages well.
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