60 percent because if you divide if you multiply 18 by 100 it gives you 18000 then divide it by 30 it gives you 60
Answer:
The answer is "
"
Step-by-step explanation:
Given values:

Using formula:

Put the values in the above formula:

Total angle for the pie chart = 360°
13 out of 60 = 13 / 60
Angle for it = 13 / 60 * 360 = 13 * 6 = 78°
Angle used = 78°
Do you have a picture to go with it?