Percentage width in a RelativeLayout

Question

I am working on a form layout for a Login Activity in my Android App. The image below is how I want it to look like:

Answer 1

You can accomplish this via layout weights. A weight dictates how the unclaimed portions of the screen are divided up. Give each EditText a layout_width of 0, and some proportional weight. I.e., give one a weight of 2, and the other a weight of 1 if you want the first to take up twice as much space.