[X4U] Tiger's Calculator.app no longer does percentages?

[DZ-Jay]

Aron Spencer wrote:
> No, in "math", you don't necessarily need units. In finance science,  or 
> other applied fields, you need units.
> 

Algebra:  A branch of mathematics in which symbols, usually letters of 
the alphabet, represent numbers or members of a specified set and are 
used to represent quantities and to express general relationships that 
hold for all members of the set.

Geometry:  The mathematics of the properties, measurement, and 
relationships of points, lines, angles, surfaces, and solids.

Trigonometry:  The branch of mathematics that deals with the 
relationships between the sides and the angles of triangles and the 
calculations based on them, particularly the trigonometric functions.

Calculus:  The branch of mathematics that deals with limits and the 
differentiation and integration of functions of one or more variables.

Do we agree that all of the above are in fact "math" or branches of it? 
  If so, would you consider the notion that, say, there's a difference 
between degrees and radians (trigonometry) and that you need to specify 
what the numbers apply to?  All of the above contain their own set of 
measuring units and qualifiers, if at the very least to differentiate 
when adding two POINTS or LINE SEGMENTS.

	dZ.