What is the deference between 50% and 50px

Question

Alignment

Answer 1

These 2 will only be the same if your screen is only 100 pixels wide. The 50% means that the line you are displaying, for example, will have a length of 50% of the screen width. So if the screen is 900 pixels wide, the line will have a length of 450 pixels.
50p on the other hand, means that the line you are displaying will be only 50 pixels wide, no matter the width of the screen

Answer 2

Thanks bro

Answer 3

No problem