Question: What is 20 percent of 21

Answer: 20 percent of 21 is 4.2

The fastest step by step guide for calculating what is 20 percent of 21

We already have our first value 20 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 = 20/100

STEP 2 Y = 20/100 × 21

STEP 3 Y = 20 ÷ 100 × 21

STEP 4 Y = 4.2

Finally, we have found the value of Y which is 4.2 and that is our answer.

If you want to use a calculator to know what is 20 percent of 21, simply enter 20 ÷ 100 × 21 and you will get your answer which is 4.2

You may also be interested in:

Here is a calculator to solve percentage calculations such as what is 20% 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.

What is% of

Sample questions and answers

Question: At a high school 20 percent of seniors went on a mission trip. There were 21 seniors. How many seniors went on the trip?

Answer: 4.2 seniors went on the trip.


Question: 20 percent of the children in kindergarten like Thomas the Train. If there are 21 kids in kindergarten, how many of them like Thomas?

Answer: 4.2 kids like Thomas the Train.

Have time and want to learn the details?

Let's solve the equation for Y by first rewriting it as: 100% / 21 = 20% / Y

Drop the percentage marks to simplify your calculations: 100 / 21 = 20 / Y

Multiply both sides by Y to transfer it on the left side of the equation: Y ( 100 / 21 ) = 20

To isolate Y, multiply both sides by 21 / 100, we will have: Y = 20 ( 21 / 100 )

Computing the right side, we get: Y = 4.2

This leaves us with our final answer: 20% of 21 is 4.2

Percentage Table

20 percent of 21 is 4.2
20.01 percent of 21 is 4.202
20.02 percent of 21 is 4.204
20.03 percent of 21 is 4.206
20.04 percent of 21 is 4.208
20.05 percent of 21 is 4.211
20.06 percent of 21 is 4.213
20.07 percent of 21 is 4.215
20.08 percent of 21 is 4.217
20.09 percent of 21 is 4.219
20.1 percent of 21 is 4.221
20.11 percent of 21 is 4.223
20.12 percent of 21 is 4.225
20.13 percent of 21 is 4.227
20.14 percent of 21 is 4.229
20.15 percent of 21 is 4.232
20.16 percent of 21 is 4.234
20.17 percent of 21 is 4.236
20.18 percent of 21 is 4.238
20.19 percent of 21 is 4.24
20.2 percent of 21 is 4.242
20.21 percent of 21 is 4.244
20.22 percent of 21 is 4.246
20.23 percent of 21 is 4.248
20.24 percent of 21 is 4.25
20.25 percent of 21 is 4.253
20.26 percent of 21 is 4.255
20.27 percent of 21 is 4.257
20.28 percent of 21 is 4.259
20.29 percent of 21 is 4.261
20.3 percent of 21 is 4.263
20.31 percent of 21 is 4.265
20.32 percent of 21 is 4.267
20.33 percent of 21 is 4.269
20.34 percent of 21 is 4.271
20.35 percent of 21 is 4.274
20.36 percent of 21 is 4.276
20.37 percent of 21 is 4.278
20.38 percent of 21 is 4.28
20.39 percent of 21 is 4.282
20.4 percent of 21 is 4.284
20.41 percent of 21 is 4.286
20.42 percent of 21 is 4.288
20.43 percent of 21 is 4.29
20.44 percent of 21 is 4.292
20.45 percent of 21 is 4.295
20.46 percent of 21 is 4.297
20.47 percent of 21 is 4.299
20.48 percent of 21 is 4.301
20.49 percent of 21 is 4.303
20.5 percent of 21 is 4.305
20.51 percent of 21 is 4.307
20.52 percent of 21 is 4.309
20.53 percent of 21 is 4.311
20.54 percent of 21 is 4.313
20.55 percent of 21 is 4.316
20.56 percent of 21 is 4.318
20.57 percent of 21 is 4.32
20.58 percent of 21 is 4.322
20.59 percent of 21 is 4.324
20.6 percent of 21 is 4.326
20.61 percent of 21 is 4.328
20.62 percent of 21 is 4.33
20.63 percent of 21 is 4.332
20.64 percent of 21 is 4.334
20.65 percent of 21 is 4.337
20.66 percent of 21 is 4.339
20.67 percent of 21 is 4.341
20.68 percent of 21 is 4.343
20.69 percent of 21 is 4.345
20.7 percent of 21 is 4.347
20.71 percent of 21 is 4.349
20.72 percent of 21 is 4.351
20.73 percent of 21 is 4.353
20.74 percent of 21 is 4.355
20.75 percent of 21 is 4.358
20.76 percent of 21 is 4.36
20.77 percent of 21 is 4.362
20.78 percent of 21 is 4.364
20.79 percent of 21 is 4.366
20.8 percent of 21 is 4.368
20.81 percent of 21 is 4.37
20.82 percent of 21 is 4.372
20.83 percent of 21 is 4.374
20.84 percent of 21 is 4.376
20.85 percent of 21 is 4.379
20.86 percent of 21 is 4.381
20.87 percent of 21 is 4.383
20.88 percent of 21 is 4.385
20.89 percent of 21 is 4.387
20.9 percent of 21 is 4.389
20.91 percent of 21 is 4.391
20.92 percent of 21 is 4.393
20.93 percent of 21 is 4.395
20.94 percent of 21 is 4.397
20.95 percent of 21 is 4.4
20.96 percent of 21 is 4.402
20.97 percent of 21 is 4.404
20.98 percent of 21 is 4.406
20.99 percent of 21 is 4.408