Get percentage shared between 2 numbers

[AdRock]

I feel really stupid for asking this question but i don't know where to find out how to do it.

I have a number is columns A, B and C

Say in column A i have 1000, column B is 30000 and column C is 10000.

In column D and E i want to know (in number format) what percentage of column A goes in these columns. I would expect column D to have 666.66 and column E to have 333.33.

I know it's a simple sum but i really can't remember the math to find out these numbers.

Can anyone please remind me how to do this?

 

[Asala42]

Are you sure it's not 750 and 250?
I'm not sure what logic you are using to hit 2/3rds and 1/3rds out of the above numbers.

I suspect you're looking for something like:
D2: =$A2*(B2/SUM($B2:$C2))
copied right into E2: =$A2*(C2/SUM($B2:$C2))

Though this would give you 750 (1000 * 3/4) and 250 (1000 * 1/4)