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What is 9 percent of 400?

9 percent of 400

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What is 'X' percent of 'W'

What is % of
Answer: 

'P' out of 'W' as a percentage

What is out of as a percentage?
Answer: %

'P' is 'X' percent of What?

is % of what?
Answer:

Visualizing Through Pie Charts

One way of visualizing 9 percent is through a pie chart. In this example, the orange slice represents the percentage of the whole pie.

9 percent pie chart
9 percent pie chart

Visualizing Percentage with Bar Charts

Another way of visualizing percentages is using a bar chart like the one below. The orange bar represents 9, percent and the full square represents the whole or 100%.

9 percent bar chart
9 percent bar chart

Solution for 'What is 9% of 400?'

In the following example, consider that:

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 9 percent of 400. What are the steps?

Step 1: First determine the value of the whole amount. We assume that the whole amount is 400.

Step 2: Determine the percentage, which is 9.

Step 3: Convert the percentage 9% to its decimal form by dividing 9 by 100 to get the decimal number 0.09:

9100 = 0.09

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

9.0 → 0.90 → 0.09

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

0.09 x 400 = 36 (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 = 400 × 9100 = 400 × 0.09 = 36 (answer)

Therefore, the answer is 36 is that 9 percent of 400.

Sample percentage problems

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