A typical resawing of a Brazilian Rosewood guitar sides block:
Rosewood sides block
Rosewood side slices
The above Rosewood block measures 1.033 inch, and the resulting 6 side slices are 0.808 inch. So each one is 0.135 inch thick. This means that 0.225 inch (or 22%) became sawdust.
The Saw

The Saw Carriage

The Setup


The final product