In the following question, there is a sentence which is divided into four parts. Choose the fragment that carries an error (if any). Ignore punctuation errors if any.
This study takes its place alongside earlier research showing / that the kids who are allowed to serve their own food / take smaller portions than they would typically be served / and ate 25 percentage less and that the kids tend to eat more when the portions on their plates have been double.
and ate 25 percentage less and that the kids tend to eat more when the portions on their plates have been double.
35 percentage less is erroneous - 25 percent less is correct usage. Use the word "percent" with numbers: use "percentage" without using a number. For example: 50 percent children, and a considerable percentage of children.