First let’s set up the problem:
513÷81 Step 1:
Take the whole number, 81, and multiply it by the denominator of the fraction, 5:
5 x 81 = 405
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:
135⋅81=13405 To display the answer to 13/5 Divided by 81 in decimal form, you can divide the numerator, 405, by the denominator, 13. The answer can be rounded to the nearest three decimal points, if needed:
13405=13405=31.15 So, in decimal form, 13 divided by 5/81 = 31.15
And in its simplest fractional form, 13 divided by 5/81 is 405/13