First let’s set up the problem:
1315÷21 Step 1:
Take the whole number, 21, and multiply it by the denominator of the fraction, 13:
13 x 21 = 273
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:
1513⋅21=15273 To display the answer to 15/13 Divided by 21 in decimal form, you can divide the numerator, 273, by the denominator, 15. The answer can be rounded to the nearest three decimal points, if needed:
15273=591=18.2 So, in decimal form, 15 divided by 13/21 = 18.2
And in its simplest fractional form, 15 divided by 13/21 is 91/5