First let’s set up the problem:
415÷78 Step 1:
Take the whole number, 78, and multiply it by the denominator of the fraction, 4:
4 x 78 = 312
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:
154⋅78=15312 To display the answer to 15/4 Divided by 78 in decimal form, you can divide the numerator, 312, by the denominator, 15. The answer can be rounded to the nearest three decimal points, if needed:
15312=5104=20.8 So, in decimal form, 15 divided by 4/78 = 20.8
And in its simplest fractional form, 15 divided by 4/78 is 104/5