Is anyone able to tell me if there is some notation that means 'an order of magnitude' or '/10' on a percentage value? I have a graph (see below) from a journal and the y-axis values are more than I would expect - I would expect in this instance 0 to 0.3% rather than 0 - 3% than seems to be shown on graph.
The quality of journal doc is pretty poor but there appears to be a little dot to the right of the percentage. I was wondering/ hoping this has some significance.
If anyone can shine a light it would be much appreciated.
zoomed up a bit...
That seems to be a per mille (${}^{\circ}/_{\circ \circ}$) symbol, which indicates a ratio in parts per $1000$, just as a percentage symbol indicates a ratio in parts per $100$.