Is it
percentage of distance travelled you go up in height - eg a 1:5 gradient is one where you travel one metre in height for every five metres you go forwards, then a 20% means that for every five metres you go forwards, you go upwards one metre - one metre being 20% of 5 metres.
Was that the worst explanation ever? argh
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Mon 19 Feb 2007, 20:57,
archived)
Was that the worst explanation ever? argh