It is called the fraction bar.
Chat with our AI personalities
The terms of a fraction are 'Numerator' and 'Denominator.' The numerator is the number atop the dividing line, the denominator is that on the bottom. For example, in 5/7, five is the numerator, and seven is the denominator.
vinculum
That is a vinculum.
When you multiply fractions just line them up (denominator and denominator, numerator and numerator) then multiply across. Simplify.
divider