It says write the question correctly the sentence is "when she first started at out new school it seemed difficulter than their old one" what is the correct way?

Answer:-

When she first started at new school, it seemed more difficult than the/her old one.

Explanation:-

The comparative degree of the word difficult is “more difficult”.

Hence, difficulter is totally incorrect to say or write.

you need to make an explanation. so, since you did not include one, so no one, and i mean no one can unfortunately you,