Hey everyone, I'm not a mathematician and actually struggle with maths anyway. I was doing this drug calculation and we have to show all our working out in detail and I'm struggling.

A patient has been prescribed 335 mg of drug X suspension. How manymls would you administer?

The label on Drug X states 250mg/5ml

So the answer is 6.7 mls which I would draw up in a syringe

But I can't seem to get to that answer on paper. I'm suppose to divide 335 by 250 x 5 = 6.7 mls

But to do this using long division on paper without a calculator and I have to do 250/335 I am getting 1 r 85. This is my working out in detail...

1x 250 / 335

2x 500 -250 1

4x 1000 = 85 = 1

8x 2000

Answer = 1 with remainder 85

Where am I going wrong? How to I get to 6.7 ???