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A percentage gradient tells you how many you go up or down for every 100 along, for example a gradient of 5% means for every 100m along you go, you will go up or down 5m.

Given a percentage gradient, converting it to a decimal (by dividing by 100) will give the TAN of the angle of the slope, for example a gradient of 5% means the angle = arctan(5/100) = arctan(0.05) ~= 2.9o.

The 1 in x gradient that tells you for every 1 up or down you go you go x along, for example 1 in 20 means you will go up or down 1 yd for every 20 yds along.

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14y ago

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