When analyzing multiple select type questions, by default the total is displayed as cumulative frequency.
The cumulative frequency defaults to total 100% as displayed below.
To see the total respondents who answered the question you can do so by going to: Login >> Surveys >> Analytics >> Dashboard
Go to the particular question and click on the Settings Gear. On the popup, click on the Configure Reporting link. This will open the Configure Reporting popup. Here you can set the percentage calculation mode under Customized Analytics / Computed Values.You can set your preferred percentage calculation mode under org settings and this will be applied to all new surveys you create.
Go to: Organization » Settings On the settings popup, select the preferred percentage calculation mode and save. Once the changes are saved, all new surveys created will have the saved percentage calculation mode by default.This feature is available with the following licenses :