Why is 0.391 closer to0.5 than 1 and 0?

Answer 1

0.391 is 0.391 - 0 = 0.391 from 0;

0.391 is 1 - 0.391 = 0.609 from 1;

0.391 is 0.5 - 0.391 = 0.109 from 0.5;

The smallest distance is 0.109, thus 0.391 is closer to 0.5 than to 1 or 0.