then the whole is
With the following abbreviations the formulas for calculating percentages can be written as follows.
G : Basic value
p% : Percentage
p : Percent number
W : Percent value
The indication of a slope or a gradient in percent indicates how much the altitude changes in relation to the horizontal distance. For example, 10% slope are reached per 100m horizontally 10m vertical. This corresponds to an angle of 5.7 °. The angle is given by arctan (p / 100).
Here is a list of of further useful calculators:Index Percentage calculation Per mille calculation Interest calculation Rule of three calculation Fraction Arithmetic