First let’s set up the problem:
1510÷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:
1015⋅21=10315 To display the answer to 10/15 Divided by 21 in decimal form, you can divide the numerator, 315, by the denominator, 10. The answer can be rounded to the nearest three decimal points, if needed:
10315=263=31.5 So, in decimal form, 10 divided by 15/21 = 31.5
And in its simplest fractional form, 10 divided by 15/21 is 63/2