As communicators it is important to understand whether the information we are presenting is correct. Here are some tools to help understand some statistical information.
This one always seems to confuse people.
You need to enter two numeric values first. Please leave off any unit indicators.
Here's the math:
((end − start) ÷ start) × 100
Moore, D. S. & Notz, W. I. (2014). Statistics: Concepts and controversies (8th ed.). New York: W. H. Freeman.