Solved: What is 10 Percent of 21? = 2.1 | 10% of 21 = 2.1

Percentage Calculator: 10 Percent of 21

Here is a calculator to solve percentage calculations such as what is 10% of 21. You can solve this type of calculation with your values by entering them into the calculator's fields, and click 'Calculate' to get the Result and Explanation!

Calculation of What is 10 percent of 21:

10 percent * 21 =

(10 / 100) * 21 =

(10 * 21) / 100 =

210 / 100 =

2.1

Now we have the answer: 10% of 21 = 2.1. Alternatively, we can express it as: 2.1 is equivalent to 10 percent of 21.

Mathematical Notation: 10% * 21 = (10 / 100) * 21 = (10 * 21) / 100 = 210 / 100 = 2.1

Formula we can use to solve our problem:

Formula: X/100 × Y

Let's use the example of "What is 10% of 21?" to understand the calculation:

= 10/100 × 21 = 2.1

Check our "What is X Percent of Y" Calculator for more methods and formulas

Solution for "What is 10 percent of 21" with Step-by-step guide:

Step 1: Start with the given output value, which is 2.1.

Step 2: Use the variable 'x' to represent the unknown value.

Step 3: From Step 1, we know that 2.1 is equivalent to 100%.

Step 4: Similarly, we can determine that 'x' represents 10% of the value.

Step 5: This leads us to two simple equations:

Equation 1: 21 equals 100%
Equation 2: 'x' equals 10%

Step 6: To solve for 'x', we divide equation 1 by equation 2, considering that both equations have the same unit (%). Thus, we obtain:
21 / x = 100% / 10%

Step 7: By taking the reciprocal of both sides of the equation obtained in Step 6, we have:
x / 21 = 10 / 100
⇒ x = 2.1

Therefore, we conclude that 10% of 21 is equal to 2.1.

I hope explanation above helps you understand how to calculate 10 percent of 21

Written by: Dr. Mohammad Monir Uddin

Associate Professor, Ph.D. (in Mathematics), M.Sc. (in Applied Mathematics)

Quick Tip - How Calculate 10 percent of 21 on calculator

If you want to use a calculator to know what is 10 percent of 21, simply enter 10 ÷ 100 × 21 and you will get your answer which is 2.1

Frequently Asked Questions on What is 10 percent of 21

1. How do I calculate percentage of a total?

To calculate percentages of a total: determine the part, divide it by the total, and multiply by 100.

2. What is 10% of 21?

10 percent of 21 is 2.1.

3. How to calculate 10 percent of 21?

Multiply 10/100 by 21 = (10/100) * 21 = (10 * 21) / 100 = 2.1.

2. 10 of 21?

10 of 21 = 2.1.

4. what is 10 percent of 21 dollars?

2.1 dollars.

Sample questions and answers

Question: At a high school 10 percent of seniors went on a mission trip. There were 21 seniors. How many seniors went on the trip?

Answer: 2.1 seniors went on the trip.

Question: 10 percent of the children in kindergarten like Thomas the Train. If there are 21 kids in kindergarten, how many of them like Thomas?

Answer: 2.1 kids like Thomas the Train.

What is 10 percent of 21? (10% of 21?)

Answer: 10 percent of 21 is 2.1. Alternatively, we can say that 2.1 is equivalent to 10% of 21.