# 20 percent of 90.00?

## Percentage Calculator

### Solution for 'What is 20% of 90.00?'

In the following example consider that:

- The percentage figure is represented by X%
- The whole amount is represented by W
- The portion amount or part is represented by P

#### Solution Steps

The following question is of the type "How much X percent of W", where W is the whole amount and X is the percentage figure or rate".

Let's say that you need to find 20 percent of 90.00. What are the steps?

Step 1: first determine the value of the whole amount. We assume that the whole amount is 90.00.

Step 2: determine the percentage, which is 20.

Step 3: Convert the percentage 20% to its decimal form by dividing 20 into 100 to get the decimal number 0.2:

20100 = 0.2

Notice that dividing into 100 is the same as moving the decimal point two places to the left.

20.0 → 2.00 → 0.20

Step 4: Finally, find the portion by multiplying the decimal form, found in the previous step, by the whole amount:

0.2 x 90.00 = 18 (answer).

The steps above are expressed by the formula:

P = W × X%100

This formula says that:

*"To find the portion or the part from the whole amount, multiply the whole by the percentage, then divide the result by 100"*.

The symbol % means the percentage expressed in a fraction or multiple of one hundred.

Replacing these values in the formula, we get:

P = 90.00 × 20100 = 90.00 × 0.2 = 18 (answer)

Therefore, the answer is 18 is 20 percent of 90.00.