On this question:She then ate half of the remaining Skittles and saved the rest. What fraction of the bag of Skittles did she save? Simplify the fraction,if possible

Did I have to simplify 25/80 to get 5/16? If I did where was I suppose to get 25/80 from cause I thought it was 30/80. I thought I had to find what was half of 30 so I got 15/80 than simplified that to 3/16.