We already have our first value **21** and the second value **75**. 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 = 2175

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

STEP 2 Y = 2175 × 100100 = 28100

STEP 3 Y = 28

Finally, we have found the value of Y which is 28 and that is our answer.

If you want to use a calculator to find **21 is what percent of 75**, simply enter **21 ÷ 75 × 100** and you will get your answer which is **28**

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Here is a calculator to solve percentage calculations such as 21 is what percent of 75. 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 21 coins from his list of 75 coins. What percent of coins has he collected?

**Answer:** He collected 28 percent of the coins from his list.

**Question:** Your aunt has baked 75 cookies, and she gave you 21 to take home with you. What percent of the cookies did she give you?

**Answer:** 28 percent of the cookies.

Let's solve the equation for Y by first rewriting it as: **100% / 75 = Y% / 21**

Drop the percentage marks to simplify your calculations: **100 / 75 = Y / 21**

Multiply both sides by 21 to isolate Y on the right side of the equation: **21 ( 100 / 75 ) = Y**

Computing the left side, we get: **28 = Y**

This leaves us with our final answer: **21 is 28 percent of 75**

21 is 28 percent of 75 |

21.01 is 28.013 percent of 75 |

21.02 is 28.027 percent of 75 |

21.03 is 28.04 percent of 75 |

21.04 is 28.053 percent of 75 |

21.05 is 28.067 percent of 75 |

21.06 is 28.08 percent of 75 |

21.07 is 28.093 percent of 75 |

21.08 is 28.107 percent of 75 |

21.09 is 28.12 percent of 75 |

21.1 is 28.133 percent of 75 |

21.11 is 28.147 percent of 75 |

21.12 is 28.16 percent of 75 |

21.13 is 28.173 percent of 75 |

21.14 is 28.187 percent of 75 |

21.15 is 28.2 percent of 75 |

21.16 is 28.213 percent of 75 |

21.17 is 28.227 percent of 75 |

21.18 is 28.24 percent of 75 |

21.19 is 28.253 percent of 75 |

21.2 is 28.267 percent of 75 |

21.21 is 28.28 percent of 75 |

21.22 is 28.293 percent of 75 |

21.23 is 28.307 percent of 75 |

21.24 is 28.32 percent of 75 |

21.25 is 28.333 percent of 75 |

21.26 is 28.347 percent of 75 |

21.27 is 28.36 percent of 75 |

21.28 is 28.373 percent of 75 |

21.29 is 28.387 percent of 75 |

21.3 is 28.4 percent of 75 |

21.31 is 28.413 percent of 75 |

21.32 is 28.427 percent of 75 |

21.33 is 28.44 percent of 75 |

21.34 is 28.453 percent of 75 |

21.35 is 28.467 percent of 75 |

21.36 is 28.48 percent of 75 |

21.37 is 28.493 percent of 75 |

21.38 is 28.507 percent of 75 |

21.39 is 28.52 percent of 75 |

21.4 is 28.533 percent of 75 |

21.41 is 28.547 percent of 75 |

21.42 is 28.56 percent of 75 |

21.43 is 28.573 percent of 75 |

21.44 is 28.587 percent of 75 |

21.45 is 28.6 percent of 75 |

21.46 is 28.613 percent of 75 |

21.47 is 28.627 percent of 75 |

21.48 is 28.64 percent of 75 |

21.49 is 28.653 percent of 75 |

21.5 is 28.667 percent of 75 |

21.51 is 28.68 percent of 75 |

21.52 is 28.693 percent of 75 |

21.53 is 28.707 percent of 75 |

21.54 is 28.72 percent of 75 |

21.55 is 28.733 percent of 75 |

21.56 is 28.747 percent of 75 |

21.57 is 28.76 percent of 75 |

21.58 is 28.773 percent of 75 |

21.59 is 28.787 percent of 75 |

21.6 is 28.8 percent of 75 |

21.61 is 28.813 percent of 75 |

21.62 is 28.827 percent of 75 |

21.63 is 28.84 percent of 75 |

21.64 is 28.853 percent of 75 |

21.65 is 28.867 percent of 75 |

21.66 is 28.88 percent of 75 |

21.67 is 28.893 percent of 75 |

21.68 is 28.907 percent of 75 |

21.69 is 28.92 percent of 75 |

21.7 is 28.933 percent of 75 |

21.71 is 28.947 percent of 75 |

21.72 is 28.96 percent of 75 |

21.73 is 28.973 percent of 75 |

21.74 is 28.987 percent of 75 |

21.75 is 29 percent of 75 |

21.76 is 29.013 percent of 75 |

21.77 is 29.027 percent of 75 |

21.78 is 29.04 percent of 75 |

21.79 is 29.053 percent of 75 |

21.8 is 29.067 percent of 75 |

21.81 is 29.08 percent of 75 |

21.82 is 29.093 percent of 75 |

21.83 is 29.107 percent of 75 |

21.84 is 29.12 percent of 75 |

21.85 is 29.133 percent of 75 |

21.86 is 29.147 percent of 75 |

21.87 is 29.16 percent of 75 |

21.88 is 29.173 percent of 75 |

21.89 is 29.187 percent of 75 |

21.9 is 29.2 percent of 75 |

21.91 is 29.213 percent of 75 |

21.92 is 29.227 percent of 75 |

21.93 is 29.24 percent of 75 |

21.94 is 29.253 percent of 75 |

21.95 is 29.267 percent of 75 |

21.96 is 29.28 percent of 75 |

21.97 is 29.293 percent of 75 |

21.98 is 29.307 percent of 75 |

21.99 is 29.32 percent of 75 |