ratio

A ratio of a whole.

A ratio is written as a number, followed by a percent sign. Ratios most often appear as part of a relative length, to specify the size of some layout element relative to the page or some container.

However, they can also describe any other property that is relative to some base, e.g. an amount of horizontal scaling or the height of parentheses relative to the height of the content they enclose.

Scripting

Within your own code, you can use ratios as you like. You can multiply them with various other types as shown below:

Multiply by	Example	Result
ratio	27% * 10%	2.7%
length	27% * 100pt	27pt
relative	27% * (10% + 100pt)	2.7% + 27pt
angle	27% * 100deg	27deg
int	27% * 2	54%
float	27% * 0.37037	10%
fraction	27% * 3fr	0.81fr

When ratios are displayed in the document, they are rounded to two significant digits for readability.