• Dropbox average net profit margin for 2016-12-31 was 0%, a 0% decline from 2017-03-31.
• Dropbox average net profit margin for 2017-03-31 was 0%, a 0% decline from 2017-06-30.
• Dropbox average net profit margin for 2017-06-30 was 0%, a 0% decline from 2017-09-30.

Net profit margin can be defined as net Income as a portion of total sales revenue.