40 is What Percent of 320? = 12.5% [With 2 Solutions]


Determining percentages is an important mathematical skill used in many real-world situations.

In this article, we will explore the question “40 is what percent of 320?” step-by-step and discuss various methods to find the percentage.

Utilizing the “X is What Percent of Y Calculator”,we can compute that 40 is 12.5% of 320.

X is What Percent of Y - Percentage Calculator

Step-by-Step Solution: 40 is What Percent of 320?

Now that we know we want to find 40 is what percent of 320? , let’s look at two different step-by-step methods we can use to solve this percentage problem. Each approach arrives at the same solution, but understanding different ways to think through the math builds flexibility and deeper learning.

Method 1: Convert Ratio to Percentage

Fractions consist of a numerator and denominator. Fractions consist of a numerator and denominator. The numerator represents the number of pieces being considered, while the denominator is the total number of pieces that make up the whole.

“Percent” means “per hundred”. So percent is another way to express a fraction where the denominator is always 100.

For example, the percentage 50% indicates we have 50 out of a total of 100 pieces. 50% can be rewritten as the fraction 50/100, since we have 50 parts out of 100 total parts.

In summary, to convert a fraction to a percentage, we multiply the numerator and denominator by the same value so that the denominator becomes 100. Once we have a fraction with a denominator of 100, the numerator gives us the percentage amount. This allows any fraction to be converted to an equivalent percentage based on the concept of “out of 100”.

Let’s apply this understanding to calculate “40 is what percent of 320?”.

Step1: Write the Ratio as a Fraction

First, we can express “40 is what percent of 320?” as the fraction 40/320.

40 of 320 can be written as: 40 / 320

Step 2: Find the Number to Multiply to Get a Denominator of 100

We want the denominator to be 100, so need to multiply by a number that makes 320 into 100

To find this number, divide 100 by 320:

100 /320 = 0.3125

Step 3: Multiply the Fraction by the Number from Step 2

Multiply both the numerator and denominator by 0.3125:

40/320 x 0.3125/0.3125
= 40 x 0.3125/320 x 0.3125
= 12.5/100

Step 4: The Numerator is Now the Percentage

Since our new denominator is 100, the numerator 12.5 represents the percentage

This step-by-step method of converting the ratio 40 : 320 to a fraction and then a percentage with a denominator of 100 allows us to calculate that 40 is 12.5% of 320.

Method 2: Converting Fractions to Decimals and Percents

You can also use division to convert a fraction to a decimal and then to a percentage.

Step 1: Write the Fraction

Start with the original fraction:

40 of 320 can be written as: 40 / 320

Step 2: Divide the Numerator by the Denominator

Use long division to divide the numerator by the denominator:

40 / 320 = 0.125

Step 3: Multiply the Decimal by 100

To convert the decimal to a percentage, multiply it by 100:

0.125 x 100 = 12.5%

Therefore, by dividing 40/320 to 0.125 and then multiplying by 100, the result is 12.5%

Following this process carefully of dividing the fraction, multiplying the decimal by 100, and interpreting the result as a percentage provides us another method to find that 40 is 12.5% of 320.

Comparing the Two Methods

Let’s summarize the two methods we used to find the percentage “40 is what percent of 320?”:

Method Description Steps
Convert Ratio to Percentage Converts the ratio to a fraction, then multiplies to make the denominator 100 1. Write ratio as fraction
2. Multiply to make denominator 100
3. Numerator is the percentage
Convert Fraction to Decimal and Percentage Divides the fraction to a decimal, then multiplies the decimal by 100 1. Write the fraction
2. Divide numerator by denominator
3. Multiply decimal by 100
4. Result is the percentage

The ratio to percentage method directly converts the ratio 40 : 320 to an equivalent percentage fraction. The fraction to decimal method indirectly converts the fraction 40/320 to a decimal and then a percentage.

p>Both methods follow a clear step-by-step procedure to arrive at the same result that 40 is 12.5% of 320. Understanding multiple approaches builds flexibility in thinking through percentage problems.

Standard Percentage of 320 Calculation Examples

Now that we have calculated that 40 is 12.5% of 320, let’s explore what 5%, 10%, up to 95% of 320 would be.

16 is 5% of 320

32 is 10% of 320

48 is 15% of 320

64 is 20% of 320

80 is 25% of 320

96 is 30% of 320

112 is 35% of 320

128 is 40% of 320

144 is 45% of 320

160 is 50% of 320

176 is 55% of 320

192 is 60% of 320

208 is 65% of 320

224 is 70% of 320

240 is 75% of 320

256 is 80% of 320

272 is 85% of 320

288 is 90% of 320

304 is 95% of 320

320 is 100% of 320


Finding percentages is an essential mathematical skill used in daily life for calculations of discounts, taxes, tips, interest rates, test scores, and more. In this article, we explored the specific question “40 is what percent of 320?” and discussed two methods to solve it – converting a ratio to a percentage and converting a fraction to a decimal and percentage. Both methods carefully followed arrive at the solution that 40 is 12.5% of 320.

We also looked at calculating a range of standard percentages from 5% to 95% of the total number 320. Practicing these types of percentage calculations helps improve mathematical proficiency and comfort applying different techniques.

How useful was this post?

Click on a star to rate it!

Average rating 0 / 5. Vote count: 0

No votes so far! Be the first to rate this post.