How to make 1=200%?

I'm trying to do a spread*** for someone where they want to show the cost including markup.

I have 3 fields
Cost(B2) Markup(C2) CPM(D2) (cost plus markup)

Then for example I have these values

..68, 2, $1.36

As you can see CPM is just Cost*Markup

However the person doesn't want it to say 2 he wants it to say 100%

Or similarly if I have another item that is
B3, C3, D3
..68, 1.75, $1.19 he'd want it to say 75%

I don't know how to do the math so it would work like he wants.

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