# Question

1. Hi, everyone

I have a math question, If you have 750mg ordered q 4 hours and available 1gram per 50ml, how do you know which to change, the mg or grams?
•

3. you have to change the 750 bc you cannot change what you have on hand.
4. Thanks, you were a big help
5. Quote from mp17
Hi, everyone

I have a math question, If you have 750mg ordered q 4 hours and available 1gram per 50ml, how do you know which to change, the mg or grams?
change the milligrams to grams becuase you cannot change what you have on hand. so change the 750 mg to grams
6. Quote from jjt
you have to change the 750 bc you cannot change what you have on hand.
Quote from peridotgirl
change the milligrams to grams becuase you cannot change what you have on hand. so change the 750 mg to grams

not really. i would rather change the gram to mg. it is much easier to work with whole numbers than decimals. plus, in this problem you will be administering meds in ml not mg, so yes you can definitely change the grams to mg because what you have on hand is in ml not grams.

for example, this is how i would do this

1. convert 1 g to 1000 mg
2. then i would do the ratio and proportion

= (750 mg / 1000 mg) x 50 ml
= (3/4) x 50 ml
= (3/2) x 25 ml
= 75/2

= 37.5 ml (this is how much you would give)

there is nothing wrong with how jjt and peridotgirl would tackle the problem. i just want my numbers to be whole so they are easier to work with.

you will have the same answer but i think whole numbers are easier to work with compare to

(0.75 g / 1 g ) x 50 ml

p.s. my instructor always says always work with whole numbers.
ofcourse if you use the calculator, it does not matter.
i am not allowed to use calculator at school.

angel
Last edit by agldragonRN on Dec 23, '07
7. Quote from agldragon
not really. i would rather change the gram to mg. it is much easier to work with whole numbers than decimals. plus, in this problem you will be administering meds in ml not mg, so yes you can definitely change the grams to mg because what you have on hand is in ml not grams.

for example, this is how i would do this

1. convert 1 g to 1000 mg
2. then i would do the ratio and proportion

= (750 mg / 1000 mg) x 50 ml
= (3/4) x 50 ml
= (3/2) x 25 ml
= 75/2

= 37.5 ml (this is how much you would give)

there is nothing wrong with how jjt and peridotgirl would tackle the problem. i just want my numbers to be whole so they are easier to work with.

you will have the same answer but i think whole numbers are easier to work with compare to

(0.75 g / 1 g ) x 50 ml

p.s. my instructor always says always work with whole numbers.
ofcourse if you use the calculator, it does not matter.
i am not allowed to use calculator at school.

angel
true true.. i never thought about i that way. thanks!
8. Quote from peridotgirl
true true.. i never thought about i that way. thanks!
yup. no problem. anytime!

happy holidays!!

angel