That's correct. Here's a note about typing math.

When we write the algebraic

ratio [tex]\frac{2d}{2 - A}[/tex] with paper and pencil, it's easy to see the

denominator of the ratio because we use a horizontal

fraction bar.

We cannot type a horizontal fraction bar, so we must use grouping symbols (shown above in red) to make clear what's on the top (

numerator) and what's on the bottom (denominator).

Typing the expression 2d/2-A means this:

[tex]\dfrac{2d}{2} - A[/tex]

But typing 2d/(2 - A) means this:

[tex]\dfrac{2d}{2 - A}[/tex]

If you're a student or you need to do algebra at work, I recommend that you take the time to study beginning algebra. There are lots of free courses and textbooks available on-line. Cheers, and watch out for those hot bolts.

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