Answer :
Imagine you have a pizza the whole pizza is 100%
Then the pizza is sliced on 8 equal parts that means one slice now presents a part of whole pizza 1/8 out of 8/8 in this case one slice presents 12.5% of 100% pizza.
Then the pizza is sliced on 8 equal parts that means one slice now presents a part of whole pizza 1/8 out of 8/8 in this case one slice presents 12.5% of 100% pizza.