First let’s set up the problem:
820÷21 Step 1:
Take the whole number, 21, and multiply it by the denominator of the fraction, 8:
8 x 21 = 168
Step 2:
The result of this multiplication will now become the denominator of the answer. The answer to the problem in fraction form can now be seen:
208⋅21=20168 To display the answer to 20/8 Divided by 21 in decimal form, you can divide the numerator, 168, by the denominator, 20. The answer can be rounded to the nearest three decimal points, if needed:
20168=542=8.4 So, in decimal form, 20 divided by 8/21 = 8.4
And in its simplest fractional form, 20 divided by 8/21 is 42/5