We have UK top certified editors and proofreaders who will edit your dissertation and make correction as needed to make your master dissertation spotless.
A dissertation is either graded as fail or pass. Although the percentage only matters if it is lower than 60% which means a fail and above than 60% means a pass.
You at least require 60% marks to pass a masters dissertation. Otherwise, you will have to re-submit your dissertation in order to get your degree.