Lyle and his study team are designing spinners.

If three fourths of the sections on a different spinner have stripes and there are 24
sections, how many sections have stripes?

Three fourths of 24 sections is 24/4*3=<<24/4*3=18>>18 sections. Answer: \boxed{18}.

To find the number of sections with stripes on the spinner, we first need to determine what three fourths of 24 is.

Step 1: Calculate three fourths of 24.
3/4 * 24 = 0.75 * 24 = 18

Therefore, there are 18 sections with stripes on the spinner.

To find the number of sections with stripes on the spinner, we can set up a proportion using the given information.

Let's denote the unknown number of sections with stripes as "x".

From the given information, we know that 3/4 of the sections have stripes. Therefore, the proportion can be set up as:

(3/4) = x/24

To solve this proportion, we can cross multiply:

4 * x = 3 * 24

Simplifying the equation:

4x = 72

Now, divide both sides of the equation by 4 to isolate x:

x = 72 / 4

x = 18

Therefore, there are 18 sections with stripes on the spinner.