Respuesta :

"Keep, change, flip"

Keep the first fraction, change the division sign into multiplication, then flip the second fraction... Then multiply

For example, 
[tex] \frac{1}{2} / \frac{1}{4} [/tex]

keep, change, flip

[tex] \frac{1}{2} * \frac{4}{1} [/tex]

That will result in [tex] \frac{4}{2} [/tex]  or simplified: 2