32%, because you divide 8 by 25, which is 0.32. You then multiply it by 10 to achieve the percentage.
Use Pie the method we all learned i really can’t remember but i think it’s 3.14
Firstly, seeing that the sequence is based on odd numbers I would say that this is the formula (which will allow you to know whatever term):
nth term = 2n-1
Hope this helps!