Question 954879
12%={{{(12/100)=3/25}}}
For the next question, I'm assuming that there can only be right-handed or left-handed and that no student is considered ambidextrous.
So if you're not left handed you must be right handed. 
So the percentage right handed would be,
{{{P[r]=100-12=88}}}
In fraction form,
{{{88/100=22/25}}}
So there are more right handed than left handed students.