Please, what's the difference between 100 and 100%

Question

html 5, measurements.

Answer 1

100 without units is in pixel by default.

100px - - >100 unit to your screen in pixels.

100% - - > maximum pixels of your screen

For example your resolution width is 720px:
100% == 720px
100px == 100px

Answer 2

Hey Ojo Victor
100 is only 100 pixels of your device and 100% is your overall pixels of your device.

Ex. width="100px" will take only 100pixels and
width="100%" will take all pixels of your device width.

Hope you will understand!!!
HAPPY CODING!!!