Maths problems some one help

This is what I got

1) 1.2 mL

2) 1 mL

trying to put it in dimensional anaylsis form, hope you understand

200 mcg------1 mg ----------1.5mL

________________________________= 1 ml

----0------- 1000mcg ------0.3 mg

okay, the mcg cancel out each other, the mg cancel out each other, now you are left mL

mulitiply all the way across on each line, then divide

ok so if 1mg=1000mcg. Then 0.6 mg=600mcg. dose desired(600mcg) divided by dosage 1000mcg * 2mL= 1.2ml.

hope that helps.

Hi guys well i having a little trouble with my maths well mainly on these two questions

Prepare a dosage if 0.6mg from an available strength of 1000 mcg per 2ml

I calculated it and got 1.2 mls i think that its right but unsure

and mainly this question

A dosage of 200mcg is ordered. the strength available is 0.3mg in 1.5ml. Determine the required dosage in ml.

Well this is my working out but then i got stuck

200 mcg 4 2

----- cancel then divide the numbers and got ----- cancel = ---

300 mcg (i converted the 0.3 mg) 6 3

then place them in the formula

2 1.5

-- x --- = then i just don't know how to do it i multiplied it and got 10

3 1 but that doesn't seem right....

any help is greatly appreciated:)

Do not go crazy with math, this is what i do:

I write what they want, is this case is

200mcg, convert them to mg= 0.2mg. then what i actually have 0.3mg in 1.5ml, so:

0.2 0.3

----- = ------

x 1.5

the program is not letting me write the ratio proportion equation the right way. so is 0.2 over x then the equal sign and 0.3 over 1.5

after this you only have to cross multiply

0.3x= 0.2 times 1.5

0.3x = 0.3 divide this and you get 1 wich is the answer.

Hope this helps!!! i always use ratio proportion and always get the right answer. Good luck.