Solved: 21 is What Percent of 42? = 50 Percent

Percentage Calculator: 21 is what percent of 42

Here is a calculator to solve percentage calculations such as 21 is what percent of 42. 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.

A simple step by step solution for calculating 21 is what percent of 42

We already have our first value 21 and the second value 42. Let's assume the unknown value is Y which answer we will find out.

As we have all the required values we need, Now we can put them in a simple mathematical formula as below:

STEP 1Y = 21/42

By multiplying both numerator and denominator by 100 we will get:

STEP 2Y = 21/42 × 100/100 = 50/100

STEP 3Y = 50

Finally, we have found the value of Y which is 50 and that is our answer.

If you want to use a calculator to find 21 is what percent of 42, simply enter 21 ÷ 42 × 100 and you will get your answer which is 50

Sample questions, answers, and how to

Question: You have found your aunt’s freshly baked cookies vault which, she just baked! She told you not to eat more than 21 cookies from those, and you ended up eating 42 of them! What percent of the cookies have you eaten?

Answer: 50 percent of the cookies that she baked.

How To: The key words in this problem are "What Percent" because they let us know that it's the Percent that is missing. So the two numbers that it gives us must be the "Total" and the "Part" we have.

Part/Total = Percent

In this case, it's the Total of those cookies that your aunt's baked. So we put 21 on top and 42 on the bottom of the fraction, and now we're ready to figure out the part we don't know; the Percent.

21/42 = Percent

To find the percent, all we need to do is convert the fraction into its percent form by multiplying both top and bottom part by 100 and here is the way to figure out what the Percent is:

21/42 × 100/100 = 50/100

50 = Percent

And that means you ended up eating 50 Percent of the cookies that she baked.

Another step by step method

Step 1: Let's solve the equation for Y by first rewriting it as: 100% / 42 = Y% / 21

Step 2: Drop the percentage marks to simplify your calculations: 100 / 42 = Y / 21

Step 3: Multiply both sides by 21 to isolate Y on the right side of the equation: 21 ( 100 / 42 ) = Y

Step 4: Computing the left side, we get: 50 = Y

This leaves us with our final answer: 21 is 50 percent of 42

Question: 21 is what percent of 42?

Answer: 50 percent, which is equivalent to saying 21 out of 42 is 50%

How to calculate 21 is what percent of 42

Percentage Calculator: 21 is what percent of 42

A simple step by step solution for calculating 21 is what percent of 42

Sample questions, answers, and how to

Another step by step method

Frequently Asked Questions