a dash
It is called a vinculum.
Vinculum is the name of the line between the numerator and the denominator.
If the numerator is written above the denominator, the line is called the "bar". If the fraction is written in-line like 1/2, the line is called a "virgule".
whats the the line between fractions
When you write a division as one number above (or before) another, with a line between them, then the number on the top is the numerator. So, in the division x/y, x is the numerator. y is called the denominator.
The number above the line in a fraction is called the numerator. The number below the line is called the denominator. So in the fraction 5/7 5 is the numerator and 7 is the denominator.
It is called the fraction bar.
numerator
That is a vinculum.
The solidus line separates the numerator from the denominator in a fraction.
The line between the numerator and the denominator of a fraction is the the solidus line
the line is called a division bar