comparative figures etc are similar to other figures, so that you can make a comparison:
Comparative figures for last year clearly show how sales have declined.
5SLGtechnicalthe comparative form of an adjective or adverb shows an increase in size, quality, degree etc when it is considered in relation to something else. For example, 'bigger' is the comparative form of 'big', and 'more slowly' is the comparative form of 'slowly' [↪ superlative]
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.