First let’s set up the problem:
1215÷39 Step 1:
Take the whole number, 39, and multiply it by the denominator of the fraction, 12:
12 x 39 = 468
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:
1512⋅39=15468 To display the answer to 15/12 Divided by 39 in decimal form, you can divide the numerator, 468, by the denominator, 15. The answer can be rounded to the nearest three decimal points, if needed:
15468=5156=31.2 So, in decimal form, 15 divided by 12/39 = 31.2
And in its simplest fractional form, 15 divided by 12/39 is 156/5