Answer: 21 is 33.333 percent of 63

Assume the unknown value is 'Y', and 21 of 63 can be written as:

Y = 21 63

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

Y = 21 63 x 100 100 = 33.333 100

Y = 33.333%

Answer: 21 is 33.333 percent of 63

If you want to use a calculator, simply enter 21÷63x100 and you will get your answer which is 33.333

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Here is a calculator to solve percentage calculations such as 21 is what percent of 63. You can solve this type of calculation with your own values by entering them into the calculator's fields, and click *'Calculate'* to get the result and explanation.

Let's solve the equation for Y by first rewriting it as: **100% / 63 = Y% / 21**

Drop the percentage marks to simplify your calculations: **100 / 63 = Y / 21**

Multiply both sides by 21 to isolate Y on the right side of the equation: **21 ( 100 / 63 ) = Y**

Computing the left side, we get: **33.333 = Y**

This leaves us with our final answer: **21 is 33.333 percent of 63**