is what % of ?

You want to know the answer to this question: 90 is what percent of 20? Here is a very simple step-by-step guide to find out. This type of percentage calculation is most commonly used if you try to determine the percentage of a discount. For example, you know both the original price and the discounted price, and you would like to calculate the percentage of the discount.

1. We use the following formula: \(\text{Percentage calculation}\) = \({X \over Y}\)

2. \(X = 90\)

3. \(Y = 20\)

4. \({90 \over 20}\) = \(4.5\) = \(450\%\)

Use the percentage calculator to solve other similar percentage calculation problems. Would you like to use another calculation? Just click and you will see the result of the percentage calculation immediately:

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