First let’s set up the problem:
158÷21 Step 1:
Take the whole number, 21, and multiply it by the denominator of the fraction, 15:
15 x 21 = 315
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:
815⋅21=8315 To display the answer to 8/15 Divided by 21 in decimal form, you can divide the numerator, 315, by the denominator, 8. The answer can be rounded to the nearest three decimal points, if needed:
8315=8315=39.38 So, in decimal form, 8 divided by 15/21 = 39.38
And in its simplest fractional form, 8 divided by 15/21 is 315/8