That depends on whether you mean this



or whether you mean this

  .

As you have it written, it means the first one.

Tell me in the thank-you note form below which 
one you mean, and I'll get back to you by email.

[There is never a charge since I do this as a
hobby]

The way to tell them apart is by using
parentheses.  If you write this:

D=c-s/n 

with no parentheses, you mean this:



But if you write this:

D = (c-s)/n

then you mean this:



The rule is that when algebra is typed all on
one line, if any numerator or denominator 
contains more than one letter or one number,
there MUST be a left parenthesis "(" to show where 
the numerator or denominator begins and a right
parenthesis ")" to show where it ends.

Edwin