how to calculate percent moisture content

Initial weight minus weight equals weight loss

Take weight loss times 100

Then take that number and divide by initial weight. This gives you the percent weight loss

Example
311 – 244 = 67
67 x 100 = 6700
6700 / 311 = 21.543

I round up to 22% weight loss

Or

Weight / initial weight = percent left x 100

Example
244 / 311 = 0.784 x 100 = 78.456

So if you take 100 – 78 you get 22