We already have our first value **3** and the second value **21**. 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 1 Y = 321

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

STEP 2 Y = 321 × 100100 = 14.286100

STEP 3 Y = 14.286

Finally, we have found the value of Y which is 14.286 and that is our answer.

If you want to use a calculator to find **3 is what percent of 21**, simply enter **3 ÷ 21 × 100** and you will get your answer which is **14.286**

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Here is a calculator to solve percentage calculations such as 3 is what percent 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.

**Question:** Your Uncle, who loves to collect antique coins, collected 3 coins from his list of 21 coins. What percent of coins has he collected?

**Answer:** He collected 14.286 percent of the coins from his list.

**Question:** Your aunt has baked 21 cookies, and she gave you 3 to take home with you. What percent of the cookies did she give you?

**Answer:** 14.286 percent of the cookies.

Let's solve the equation for Y by first rewriting it as: **100% / 21 = Y% / 3**

Drop the percentage marks to simplify your calculations: **100 / 21 = Y / 3**

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

Computing the left side, we get: **14.286 = Y**

This leaves us with our final answer: **3 is 14.286 percent of 21**

3 is 14.286 percent of 21 |

3.01 is 14.333 percent of 21 |

3.02 is 14.381 percent of 21 |

3.03 is 14.429 percent of 21 |

3.04 is 14.476 percent of 21 |

3.05 is 14.524 percent of 21 |

3.06 is 14.571 percent of 21 |

3.07 is 14.619 percent of 21 |

3.08 is 14.667 percent of 21 |

3.09 is 14.714 percent of 21 |

3.1 is 14.762 percent of 21 |

3.11 is 14.81 percent of 21 |

3.12 is 14.857 percent of 21 |

3.13 is 14.905 percent of 21 |

3.14 is 14.952 percent of 21 |

3.15 is 15 percent of 21 |

3.16 is 15.048 percent of 21 |

3.17 is 15.095 percent of 21 |

3.18 is 15.143 percent of 21 |

3.19 is 15.19 percent of 21 |

3.2 is 15.238 percent of 21 |

3.21 is 15.286 percent of 21 |

3.22 is 15.333 percent of 21 |

3.23 is 15.381 percent of 21 |

3.24 is 15.429 percent of 21 |

3.25 is 15.476 percent of 21 |

3.26 is 15.524 percent of 21 |

3.27 is 15.571 percent of 21 |

3.28 is 15.619 percent of 21 |

3.29 is 15.667 percent of 21 |

3.3 is 15.714 percent of 21 |

3.31 is 15.762 percent of 21 |

3.32 is 15.81 percent of 21 |

3.33 is 15.857 percent of 21 |

3.34 is 15.905 percent of 21 |

3.35 is 15.952 percent of 21 |

3.36 is 16 percent of 21 |

3.37 is 16.048 percent of 21 |

3.38 is 16.095 percent of 21 |

3.39 is 16.143 percent of 21 |

3.4 is 16.19 percent of 21 |

3.41 is 16.238 percent of 21 |

3.42 is 16.286 percent of 21 |

3.43 is 16.333 percent of 21 |

3.44 is 16.381 percent of 21 |

3.45 is 16.429 percent of 21 |

3.46 is 16.476 percent of 21 |

3.47 is 16.524 percent of 21 |

3.48 is 16.571 percent of 21 |

3.49 is 16.619 percent of 21 |

3.5 is 16.667 percent of 21 |

3.51 is 16.714 percent of 21 |

3.52 is 16.762 percent of 21 |

3.53 is 16.81 percent of 21 |

3.54 is 16.857 percent of 21 |

3.55 is 16.905 percent of 21 |

3.56 is 16.952 percent of 21 |

3.57 is 17 percent of 21 |

3.58 is 17.048 percent of 21 |

3.59 is 17.095 percent of 21 |

3.6 is 17.143 percent of 21 |

3.61 is 17.19 percent of 21 |

3.62 is 17.238 percent of 21 |

3.63 is 17.286 percent of 21 |

3.64 is 17.333 percent of 21 |

3.65 is 17.381 percent of 21 |

3.66 is 17.429 percent of 21 |

3.67 is 17.476 percent of 21 |

3.68 is 17.524 percent of 21 |

3.69 is 17.571 percent of 21 |

3.7 is 17.619 percent of 21 |

3.71 is 17.667 percent of 21 |

3.72 is 17.714 percent of 21 |

3.73 is 17.762 percent of 21 |

3.74 is 17.81 percent of 21 |

3.75 is 17.857 percent of 21 |

3.76 is 17.905 percent of 21 |

3.77 is 17.952 percent of 21 |

3.78 is 18 percent of 21 |

3.79 is 18.048 percent of 21 |

3.8 is 18.095 percent of 21 |

3.81 is 18.143 percent of 21 |

3.82 is 18.19 percent of 21 |

3.83 is 18.238 percent of 21 |

3.84 is 18.286 percent of 21 |

3.85 is 18.333 percent of 21 |

3.86 is 18.381 percent of 21 |

3.87 is 18.429 percent of 21 |

3.88 is 18.476 percent of 21 |

3.89 is 18.524 percent of 21 |

3.9 is 18.571 percent of 21 |

3.91 is 18.619 percent of 21 |

3.92 is 18.667 percent of 21 |

3.93 is 18.714 percent of 21 |

3.94 is 18.762 percent of 21 |

3.95 is 18.81 percent of 21 |

3.96 is 18.857 percent of 21 |

3.97 is 18.905 percent of 21 |

3.98 is 18.952 percent of 21 |

3.99 is 19 percent of 21 |